Gl Columbia ^IniUcrsitP inti)cCitpof i^cU) J)oiU College of ^Ijpsicinns nub ^ui scons ^Svef erence ?tifararp Digitized by the Internet Archive in 2010 with funding from Open Knowledge Commons http://www.archive.org/details/insicknessinhealOOroos A TRAINED NURSE, IN SICKNESS AND IN HEALTH A MANUAL OF DOMESTIC MEDICINE AND SURGERY, HYGIENE, DIETETICS, AND NURSING, DEALING IN A PEACTICAL WAY WITH THE PROBLEMS RELATING TO THE MAINTENANCE OP HEALTH, THE PREVENTION AND TREATMENT OF DISEASE, AND THE MOST EFFECTIVE AID IN EMERGENCIES BY GEORGE WALDO CRARY, M. D. WILLIAM P. NORTHRUP, M. D. FREDERIC S. LEE, Ph.D. FRANK W. JACKSOX, M. D. JOSIAH ROYCE, Ph.D. SAMUEL WALDRON LAMBERT. M.D. JOSEPH HAMBLEN SEARS, A. B. FREDERICK PETERSON, M. D., Ph. D. SAMUEL T. ARMSTRONG, M. D., Ph. D. HENRY A. GRIFFIN, M. D. ALEXANDER B. JOHNSON, M. D. ANNA CAROLINE MAXWELL J. WEST ROOSEVELT, M. D. EDITOR N E W Y^ O R K D. APPLETON AND COMPANY" 1896 CorTRir.nT, ]8n6. By D. APPLETON AND COMPANY. PUBLISHERS' NOTE. In response to what appeared to be a general denmTid, the pubhsliers have prepared a book for household use that, while popular and at- tractive, embodies in a thoroughly practical form the latest and mo.st complete information in regard to domestic science and kindred topics, including medicine and surgery, hygiene, dietetics, and nursing. Knowledge of the laws governing health and disease, how to pro- mote the former and how to avoid the latter, as well as what to do and what not to do in emergencies, has hitherto been hidden away for the most part in text-books and special treatises to which the unprofessional man and woman had no access, or, if accessible, the information was so shrouded in technical language as to puzzle and disconcert the reader. It is hoped that this work, which combines scientific Avith literary excellence, will meet the requirements of the intelligent reading public. The aim throughout has been to give absolutely correct information in clear and simple language. In order that the various topics might be treated by those qualified to write with authority, the publishers secured the services of an able corps of specialists, each eminent in his own domain, who worked under the direction of experienced editors. AliTlCLKS AND ('( )NTKI lU'TOKS. The AiiutoiiiT <»f the lliiiiian lUnly. Wv tiK>Ui;K Wm.ko (kakv, M.I'.. • >ii-A:SiirKriiiijii Uoiisi-- .\'«'-KMiii Siirt:<-<'ii lo l{iM.sf < )ii> I'aiii-iit l>f|Mtrliiii-iil. mill . ,. „ 1 r«iii-.T lli>s|iiiitl, Ni'vv ViirU. IMiynioIosry : The Vital Procossps in llpitlth. I*v I'lci MKRir S. Lki:. I'll. !».. • rroft-wtoiof I'liyslolotry. C'<>liiinl>iii Ni-vv Y»rk ; Mi-imIht of tin- NfW \i-nilii«li>>;ii'al Sm-ifty. ntul of the So- cifty of'Aiiirrifuii Natiinilwis. OiitliiH's of rsvclioldirv : or, A Study ol (lit' Hiiiiiati .Miiitl. Uv .lo-siAii KoYCK. !'h. !>.. ' I'rofi'ssor of tin* Histiiry of riil|i)so|i)iy, 11.11 v.iril I'lilvi-rsily. C'iiiiitiri(l};«>. M.-issucliii- v.M- ; iKiilior of Till- i:.>;//ij/, Tlir S/iirit «/ Modern PliilvM- I'hjsifal Tiainiiiir. Ily .losKi'i! Uambi.ks Skars. a. 15.. ' llnrvnrcl C'oncli nml i-x l'a|»iaiii of i)ii> Mar- vnnl Kootlvill Tram; rililor of ll^njn r.s /t'oiiiu/ Tablr. Hvirit'nc. lU- SvMi'Ei. Treat Arm.'^tuknii. M.D.. Ph. I).. VisiiiiiK Physician to tin- Willan! PaikiT aii'l KiviTsi(|«> Mospitnls. N»mv Yoiv : ex- l'is.s»-,| A!^I II V>. .l«)II\s(fV, .M.I>.. \...,i-i ...1 Vi->tiii- Snrir<'on t<'pnrlfni'nt. New ^ork: MciniMToi (h<- Sock-iy oi Ahiinnl of Uelleruo HuHpiLal, utc. Disoascs in (>;c of I'liysicians and SiUKeons ; Atleiidinfr I'liy- sic'i.'in to Koosevelt Hospital, Outl'aiicnl l)i'partnu;nt, and Assistant Visit ins Physi- cian lo Ucllevuc Ilf)-i)ital, New Y'ork. Diseases of the Kidneys and Urinary Deransrenients. I)V .1. \Vi;sT I{oosi;vi:i,t. "^l. 0., I'liysiciiui in Cliait;e of Seton Hospital for Consumptives; Visituip Physician to Bellc- \ Me. ami AtlendiiiK Physician to Roosevelt Hospitals. New York. Diseases of Women and Midwifery. I'.y Samikl Wai.dko.v IjA.mukkt, M. 1).. Allindirijr Pliysiclan to Nursery and Cldlds Hospital and .\c\« York Lyiiifj in Hospital. Nervous and Mental Diseases. I'ly I'^UKDKKICK I'lTKKSON, M. I)., Ph. D., Child' of Cliidc of Nervous Hcpartment, ('■ille^;e of Physicians and .Suitreons. New ^ork ; Consulting Neiirolotrist to Kaiidall's Island Hospitals; Patholopist to the New \ii\\i City Insane Asylums, etc. Medicines and Treatment. l!y lliNKV A. (iiiiii'ix, M. D.. As'-isianI Physiciati to Hoosevelt Hospital, Out Patient IJeparlment, New York. Nursing the Siek. P)y .Anna t'Ai{t)i,i.M': Max\vi;i,i„ (iraduate of the lioston City IIo.s[)itnl Train- iiu; .School ; Sii[)erintendeiit of the Training School for Nurses, Presbyterian HoHpilal, New Y'ork. fKI.KSTK WI.NANS II KliliK'K, A. B., MA.NAtilMi KDITOK. TABLE OF CONTENTS. AUTICLE PAGE r. The Anatomy of the Human Body ..... 1 The skeletoi] — The bones — The joints — The muscles — The appa- ratus for the circulation of tlie blood : the heart and blood-vessels — The lymphatic system — The nervous system — The digestive or- ,a:ans : alimentary canal, liver, pancreas, and spleen — The re- spiratory system : lungs and air-passag'es leading to them — The genito-urinary system : kidneys, ureters, bladder, urethra, etc. — The organs of special sense : tongue, nose, eye, and ear— The skin — The development of the embryo. II. Physiology : The Yital Processes in Health ... 85 Man a product of evolution — The human body a machine — Or- gans — Tissues — Cells — Protoplasm — Vital energy : nature and source — Food stuffs — Nutrition — Digestion — Absorption — Circu- lation of the blood — Resi)iration^ — Metabolism, or chemical work of cells — Excretion of waste products — The muscular system — The voice — The nervous system : brain, spinal cord, and nerves — Special senses : sight, hearing, smell, taste, touch, and tempera- ture — Equilibrium of the body — Reproduction — Life — Death — DitTerences between man and woman — Heredity. III. Outlines of Psychology; or, A Study of the Human Mind 171 Definition of psychology — General characterization of mental life — The methods, conditions, and scope of- psychology — The classes of mental facts — The physical basis of mind — Nervous conditions of the manifestation of mind — Structure and function of the nervous system — Sense organs— Adjustment to the envi- ronment — Brain processes — Habit — Brain centres and lower centres — Inhibition — " Set " of the brain — Self-control — Sugges- tion—Healthy activity — Variation of labour — Worry — The feel- ings— Relation of feeling to consciousness — Pleasure and pain — Desires and aversions— Brain-fatigue — The emotions — The intel- lect, or the organization of experience — Association — Attention — Discrimination — Identification — Sensations — Perceptions — Mem- ory and Imagination — Thoughts — Judgment, belief, and reason- ing — The intellectual life — Nervous exhaustion — Hallucinations vi CONTENTS. ARTICLE PAOE — Dohisioiis — Eoot'iitrioity — The Avill. or tlio diroction of conduct — Inherited instincts — Traininjr of the will — Disorders and de- fects of the will. T\'. Pmysuwi, Tu.mnixc; 235 Necessity t)f sini])le hut regular exercises — Value of outdoor and indoor, day and nij^ht, exercises contrasted- -Value of {>-anies and s])ecijil exercises contrasted — Exercise for hrain as well as hody — Exercise as iniportiint for old as young and for women as men — Systematic work the secret of success — Influence on morality, temperance, etc. — Foothall — Baseball — Tennis — Rowino- — Skating — Kunning— Golf — Croquet — Polo — Ice sports — Riding — Cricket — Bicycling — Track athletics and others — Gynniasium and hoin(> exercises — The navy " setting-up " exercises — The Swedish system — The Delsarte system — " Training " — A scheme for a day : rising, bathing, dressing, food, arrangement of work, rest, recreation, exercise, retiring, sleeping. V. IIvciExi; 305 Hygiene of the connnunity, of the home, and of the individual — Shortcomings of modern sanitary methods — The vitiation of air — Methods of ventilating, warming, and lighting — The influence of climate on health — The soil and its influence on health — Water : sources of supply, composition, purification, and examination — Bathing — The dwelling : its site, construction, exposure, etc. — The disposal of excreta and other refuse — The inspection, imtritive value, and cost of foods — Clothing in relation to climate and health — The hygiene of infancy, adolescence, and old age — Men- tal hygiene — The hygiene of offensive and noxious trades — Com- municable diseases and their prevention. VI. Surgical Injuries and Surgical Diseases .... 431 Emergencies — General advice — Wounds : incised, punctured, con- tu.sed and lacerated, gunshot, inflamed, and poisoned — The heal- ing of Avounds — Relation of bacteria to the inflammation oc- curring in wounds — The antiseptic treatment of wounds — How to stop bleeding — Dressings and how to apply them — Bandages and bandaging — Contusioiis — Surgical diseases of the .soft jjarts: boils, carbuncle, anthrax, gangrene, necrosis, erj'sipelas, septicae- mia, pyaemia, tetanus, hydrophobia, and surgical tuberculosis — The effects of cold, heat, and caustics upon the tissues, and their treatment — Injuries and diseases of the bones — Fractures : sim- ple, compound, comminuted, complicated, and incomplete — The symptoms, repair, and treatment of fractures — Acute suppurative inflammation of bone — Rickets — Injuries and diseases of joints : contusions, s]>rains, dislocations, inflannnation, and wounds — Tumours : benign and malignant — Injuries and diseases of special regions — Injuries and diseases of the head and face — Injuries of the .scalp : contusions and infected wounds — Fractures of the skull — Concussion, compression, and laceration of the brain — Foreign CONTENTS. vii bodies in the nose, eye, ear, larynx, and alimentary canal — Nosebleed — Wounds of the eyeball — Inflammation of the eye — Inllamniation of the middle ear — Rupture of the drumhead — Wounds, acute inflammation, tubercular ulceration, and tumours of the tongue — Congenital defects : tongue-tie, cleft palate, and harelip — Catarrhal and ulcerative inllamniation of the gums and mucous linings of the cheeks — Aplithai or can- kers — Sprue — Noma — Quinsy sore throat — Enlargement of the tonsils — Decay of the teeth — Alveolar abscess — Injuries and diseases of the neck — Injuries, contusions, and fractures of the ribs — Wounds of the heart and lungs and large vessels of the thorax — Injuries, contusions, and wounds of the breast — In- juries and diseases of the spine — Injuries and diseases of the abdomen — Appendicitis — Intestinal obstruction — Diseases of the anus and rectum : painful fissure, piles, fistula, cancer — Hernia — Varicocele — Hydrocele — Injuries and diseases of the upper extremity and armpit — Wounds of arteries and veins of upper arm — Boils and abscesses in the armpit — Injuries of fore- arm : wounds — Bleeding from elbow, forearm, and ^\Tist — Teno- synovitis of wrist — Ganglion of the wTist — Wounds of the hand — Abscesses of hand and fingers — Rosenbach's erysipelas — Inflammations about the matrix of the finger nails — Dupuy- tren's contraction of the jialmar fascia — Warts — Injuries and diseases of the lower extremity — Bow legs — Knock knee — Vari- cose veins — Housemaid's knee — Ulcers of the leg — Flat foot — Bunions — Ingrowing toenail — Club foot — Death and the signs of death — Transportation of the injured — Genito-urinary. vene- real, and skin diseases. YII. Diseases in General. ....... 609 The causes of disease — Unhygienic surroimdings — Improper food — Alcohol, tobacco, and other di'ugs — Injurious habits and occupations — Lack of exercise — Inherited diseases — Infec- tious diseases : theories of infection — Theories of immiuiity from infection : inherited immunity and acquii'ed immunity — Bacteria : what they are and how they are recognised — Harmless or useful bacteria — Bacteria of disease — How bacteria get into the body — Their effects upon the tissues — The prevention and cure of bacterial diseases^ — Tuberculosis : its cause ; the man- ner in which the bacillus finds entrance, and how it sj)reads — Vaccination — Method of vaccination (inoculation) — Revac- cination — Time for vaccination in infants — Small-pox — Vario- loid — Scarlet fever — Chicken-pox — Measles — German measles — Typhoid fever — Whooping-cough — Mumps — Diphtheria — Meningitis^Malarial diseases — Yellow fever — Diseases of the blood — Gout — Rheumatism. VIII. Diseases of Digestive Organs, Heart, and Lungs . . 66'? Pleurisy : simple and subacute — Empyema — Pneumothorax — Pyopneumothorax — Diseases of the bronchi — Laryngo-ti'ache- viii CONTENTS. itis — BroiK'hitis : acute and chronic — Diseases of tlie lung — Emphysema of the lung-s — Pulmonary tuberculosis : acute and chronic — Pneumonia — Broncho-pneumonia — Influenza — Asthma — Spitting of blood — Diseases of the heart — Endocar- ditis: acute, chronic, and malignant — Dilatation of the heart: acute and chronic — Fatty heart — Angina pectoris — Nein-algia of the heart — Palpitation of the heart — Tachycardia (rapid heai't) — Exophthalmic goitre — Pericarditis — Aneurism t)f the arch of the aorta — Diseases and disorders of the digestive sys- tem — Dj'spepsia — Gastritis: acute and chronic — Ulcer, cancer, and dilatation of the stomach — Diseases of the intestines — Diar- rho-a: acute and chronic — Dysentery: acute and chronic — Con- stipation — Intestinal parasites — Diseases of the liver — Jaundices — Cirrhosis, cancer, and abscess of the liver — Diseases of the pancreas — Diseases of the spleen — Peritonitis. IX. Diseases of the Kidneys and Ukixakv Derangements . 707 Sjnnptoms of kidney disease — Stoniach disord(>rs ; headache, nausea and vomiting- — Dropsy — Acule Bright's disease — Chronic Bright's disease. — Changes in the urine in diseases (jf various kinds and in disease of the kidneys. X. Diseases of Women and Midwifery ..... 725 Menstruation — Significance of menstruation — Puberty — Normal phenomena of menstruation — Disorders of monsti'uation — Menopause — Pregnancy — Signs of pregnancy — Period and dura- tion of pregnancy — Hygiene during pregnancy — Preparation for labour — Care of a woman in labour — Antisepsis — Care of the newborn child — Lying-in period — Lactation — Artificial foods — Weaning — Diseases of pregnancy — Diseases of lying-in women — Diseases of non-pregnant women. XI, Xervous and Mental Diseases 779 Heredity — Sti*ess or strain — Nervous diseases — Abscess of the brain — Alcoholic inebriety and paralysis — Anaemia of the brain and spinal cord — Ansesthesia-r- Aphasia — Apoplexy — Atrophy- Bell's and birth palsy — Catalepsy — Convulsions — Cramp — Epi- lepsy — Exoplitlialmic goitre — Headache — Water on the brain — Hypnotism — Hysteria — Infantile si)iiial ])ai"alysis — Insomnia — Lead poisoning — Locomotor ataxia — Meningitis — Myelitis — Neu- ralgia — Neurasthenia (nervous prostration) — Neuritis — Paraly- sis — Sclerosis — Softening of the brain — St. Vitus's dance — Tic convulsif — Tic douloureux — Tremour — Vertigo — Wryneck — In- sanity — Delusi(ms — Dementia — Hallucinations — Illusions — Im- perative conceptions — Mania — Melancholia — General paresis — Paranoia. XII. ]\[edigines and Treatment ....... 823 The prevention of di.seases — General considerations — Com- mon .sen.se— Food — Drink — Exercise — Cleanliness — Temperance CONTENTS. ARTICLE — Sleep — Regular habits — Avoidance of special dang-ers, conta- gion, etc—Treatment of disease by the laity— The use of drugs — The family medicine chest— Diet and drink in disease — Position, rest in bed, etc. — Ventilation — Temperature — Light — Hygiene^^ Poultices— Plasters — Stupes — Baths — Leeching — Douches — Enemata— Artificial respiration— Disinffiction— Simple cojidi- tions not requiring a professional attendant— Biliousness— Chok- ing— Cholera morbus— Colic — Constipation — Cough — Diarrhoea — Earache — Epilepsy — Inflammation of the eyes — Fainting — Fever— Flatulence— Headache— Hiccough— Hysterica] mani- festations and nervousness— Loss of appetite— Muscular rheuma- tism and rheumatic pains — Sleeplessness— Sore feet — Sore mouth —Styes— Toothache— Vomiting— Emergencies demanding a pro- fessional attendant— Treatment to be employed pending his ar- rival—Apoplexy—Bleeding from lungs, stomach, and bowels- Coma and unconsciousness — ^Convulsions — Drowning — Exhaus- tion— Prostration— Shock— Poisoning— Suffocation— Sujistroke — Gymnastics— Massage— Movement cures— Mineral springs- " Cures " : milk, whey, grape, etc. XIII. Nursing the Sick ••••..,. Selection of the sick-room— Care of the patient and room— Heat- ing— Ventilating— Lifting and moving the patient in bed— Posi- tion— Light— Draughts— Methods of giving baths— The preven- tion and treatment of bedsores — Methods of taking and recording temperature, pulse, and respiration— Bedside notes— The prepa- ration of invalids' food— Receipts— The administration of food and medicine— Enemata— Suppositories— Douches— Counter-ir- ritation — Applications of heat and cold— Stupes — Poultices— . Packs— The ice coil— Care of the patient at night— Medical, surgical, and obstetrical nursing— Care of sick children— Con- tagious cases — Management of convalescence— Preparation of the dead. 903 LIST OF ILLUSTEATIONS. PACK The Human Skeleton 3 The Right Femur, or Thigh Bone, sawn in two lengthwise 3 Fibula tied in a Knot, after Maceration in a Dilute Acid (Dalton) .... 4 Sixth Dorsal Vertebra, from above (Quain) 5 The Spine, Lateral Aspect 5 The Human Skull 7 Skull of a Child at Birth, from above (Leishman) 8 Thorax, Anterior View (Sappey) 9 Thorax, Posterior View (Sappey) 9 Upper Surface of Left Clavicle, or Collar Bone 10 Left Scapula, or Shoulder Blade 11 Ijeft Humerus, or Bone of the Upper Arm 13 Bones of the Forearm : Left Radius and Ulna 12 Bones of the Left Hand ; Palmar Surface 13 Right Femur, or Thigh Bone 14 The Patella, or Knee Cap ' 15 Right Tibia, or Shin Bone, and Fibula or Splint Bone 16 Bones of Right Foot : Dorsal Surface 16 Right Knee Joint (Quain) 18 A Section of the Hip Joint 19 The Muscular Sj^stem 21 Muscular Fibres 23 The Bones of the Upper Extremity with the Biceps Muscle 23 The Diaphragm 24 The Heart and Large Blood-vessels 25 Heart and Ribs 26 A Schematic Diagram of the Heart 28 The Abdominal Aorta 29 The External Carotid Artery and its Branches (after Henle) 30 The Subclavian Artery (after Henle) 31 The Brachial Artery and its Branches (after Henle) 32 The Femoral Artery (after Henle) 33 The Jugular Vein, etc 34 The Veins of the Lower Extremities 35 The Portal Vein, etc 36 Lacteals and Lymphatics during Digestion (Dalton) 38 Multipolar Ganglion Cells from the Human Brain 40 xi xii LIST OF ILLUSTRATIONS. i'AOE Tlie Cerebro-ppinnl System of Nerves 41 A Vertical Mfilian .Seelioii of the Brain inclosed in its Meniluancs ami the Skull . 42 I'ppor Surface of the Cerebrum, showing: the Convolutions of tiie l^iain ;mil its Double Structure 43 Dia<;ram of the Outer Hemisphere of tile Human Brain 44 The Base of liie Brain (from Kannev, after llirschfeiti) 45 A Vertical Section of the Brain (from Flint, after llirschfelil) 48 JJrain and Spinal Cord, with the Thirty-one Pairs of Spinal Nerves .... ol Diagram showing the Relative Position of tlio Cranial and Upper S|)inal Nerves as they enjcrge from their Foramina 52 The Sympathetic or Ganglionic Nervous System .IS Tempnrary and Permanent Teeth (.Sapjjey) .5!) Salivary Ci lands (Tracy) (Il Position of Abdominal Contents 62 The Stomach . . 63 Under Surface of the Liver, showing the Gall Bladder and a Section of Blood-vessels 66 The Pancreas, partly cut away so as to show the Duct which collects the Pancreatic Juice and empties it into the Duodenum 67 Longitudinal Section of the Human Larynx, showing the Vocal Cords (Sappey) . 6!) Posterior View of the Muscles of the Larynx (Sappey) 70 Lateral View of the Muscles of the Larynx (Sai>pey) 70 Showing the Relative Position of Heart and Lungs in the Cavity of the Chest . . 71 Thyroid and Thymus Glands (Sappey) 72 ^luscles of the Eyeball (Sappey) 7(i Choroid Coat of the Eye (Sappey) 77 General A'iew of the Organ of Hearing (Sappey) 79 Segmentation of the Vitellus (Haeckel) 82 Primitive Trace of the Embryo (Liegeois) 83 Typical Cells from the Human Body 87 Human Alimentary Canal 89 Gland from the Human Intestine 92 Red and White Corpuscles of the Blood (magnified) 95 Diagram of the Heart and Vessels, with the Course of the Circulation, viewed from behind 97 Capillary Circulation in (he Web of a Frog's Foot 98 Diagrammatic Section of Veins, with Valves 99 Termination of Two Bronchial Tubes in Enlargement beset with Air Sacs (Huxley) . 105 Trachea and Lungs, dissected to show Broncliial Tubes lOd Diagrammatic View of an Air Sac 107 Diagrammatic View of Course of Uriniferous Tubules in Kidney Ill Vertical .Section of Kidney Ill Vertical Section of Skin (magnified twenty diameters) 112 Surface of Palm of Hand (magnified four diameters) 112 Composition of some Common Foods 117 Unstriped Muscle Fibres of Man (magnified 200 diameters) 121 Striped Muscle Fibres (magnified 250 diameters) 122 Series of Figures from Instantaneous Photographs to illustrate Movements in Slow Walking 124 Expression of Extreme Terror 124 Expression of Various Emotions, showing Characteristic Muscular Contractions . 125 The Average Range of Human Voices 127 Interior of Larynx, as .seen by Laryngoscope, during Production of A, Chest Voice (MaiAll and Grutzner), B, Head Voice (Mills) 128 LIST OF ILLUSTRATIONS. xiii PAOE Diagram of a Typical Neuron l-HJ rsyciiic Brain Cells in Different Stages of Evolution I'-H Diagram to illustrate Nervous Mechanism in (1) Automatic Action, (2) Reflex Action, (;3) Passage of Sensory Impulse Upward and of Motor Impulse Downward within Central Nervous System (Mills) 1-52 Diagram intended to show the Relations of tlie Brain, the Spinal Cord, and the Peripheral Organs lo3 Diagram to illustrate Reflex Actions l-'iO Section of the Cerebral Cortex of Young Mouse, showing Psychic Cells and their Branches 1-37 Side View of the Human Brain, intended to show the Positions of Various Nervous Centres (after C. K. Mills) 138 Median View of the Human Brain, intended to show the Positions of Various Ner- vous Centres (after C. K. Mills) 139 Diagram intended to show the Nervous Mechanism employed in the Understanding and Use of Language (James, after Ross) 140 Diagram intended to show the Paths of Nervous Impulses (James) .... 141 Section of the Eyeball (Flint) 143 Diagrammatic Section of the Retina (Schultze) 144 Diagrammatic Section of the Retina, intended to illustrate the Recent Discoveries as to the Structure and Relations of the Various Layers 145 Diagram for demonstrating Existence of Blind Spot 146 Diagram illustrating Refraction of Rays of Light and Formation of an Inverted Image by a Lens 146 Diagram illustrating the Mechanism of Accommodation of the Eye .... 147 Diagram of the Ear 150 Diagram of Membranous Labyrinth and Distribution of Auditory Nerve . . . 151 Diagram of Cross-section of Canal of Cochlea, showing Organ of Corti resting upon Basilar Membrane 151 Diagram of Longitudinal Section of Ampulla of Semicireidar Canal, showing Crista Acustica 153 Vertical Longitudinal Sections of the Cavity of the Nose 154 Nerve and End Organs of Sense of Smell 155 Two Taste Buds from the Rabbit's Tongue, magnified 450 diameters (Engelmann) . 155 A Human Egg much enlarged 158 Female Reproductive Organs (two thirds the natural size), as seen from behind . . 159 Human Spermatozoa 160 Segmentation of the Egg of the Rabbit 161 Embryo within the Uterus (diagrammatic) • 163 Polo : " On the Ball " (from Harper's Magazine) 241 Diagram of Football Ground • 242 Football : A Successful " Tackle " 243 Lacrosse . 244 View of a Cricket Crease with the Game going on (from Harper's Weekly) . . . 246 Golf: Act of Driving . . . ." ' . . .247 One-hundred-yard Dash 249 Rowing : Eight Oars 250 Swimming : Proper Position 254 Bicycling : Incorrect Position 255 Bicycling : Correct Position 255 Throwing the Hammer 258 Putting the Shot 258 A Woman Playing Golf 262 xiv LIST OF ILLUSTRATIONS. PAGB Bicycling: Correct Position fur a Woiium 2G4 The Fnrncse Ilorcules 268 Apollo Belvoiloro 269 Sparring . . . ' 271 Fencing 274 Single St iiks 274 Piuu'hing Bag 276 Ordinary Pulley Weights for Home or (iyiiuiasiurn I'se 278 The Home (Jynmasiuin : Horizoi\tal Bar 279 The Home Gymnasium : Parallel Bars in the Wimlow 280 Developing the Tricejis and SliouUler Muscles 282 Exercising the Al)dominal and Front Tiiigh Muscles 286 Kxercising the Alulominal Muscles 287 Diagram showing Death-rates of Children under Five Years of Age . . . .313 Diagram showing Uie Composition of Food Materials 384 Diagram sliowing the Pecuniary Economy of Food 394 Mortality Percentage of the London Smallpox Epidemic, 1871-1881 .... 418 (iranulating Wound undergoing Cicatrization 433 A]iplication of an Improvised Tourni(|uet to the Femoral Artery 447 Schapp's Tonrniiiuet (Tiemann) 448 Esmarch's Triangular Bandage 455 Triangular Bandage applied Jis a Sling and as a Retentive Bandage to Various Regions 455 Rolling a Bandage l)y Hand 456 Antiseptic Dressing applied 457 Application of a Roller Bandage to the Arm by the Spiral Jlelhod .... 457 Application of a Roller Bandage to the Arm by the Figure-of-eight Method . . 457 Spica Bandage applied to the Shoulder 458 Comminuted Fracture of the Lower End of the Humerus, caused by a Fall ui)on the Elbow 500 Transverse Fracture of the Femur 500 Oblique Fracture of the Clavicle (Stimson) 501 Longitudinal Fracture of the Tibia (Stimson) 501 Toothed Fracture of the Femur (Stimson) . . . 501 Y-shaped Fracture of the Condyles of the Humerus, caused by a Fall upon the Elbow (Bruns) . . . ." .... 501 T-shaped Fracture of the Lower End of the Femur, caused by a Fall upon the Knee (Bruns) 501 Incomplete Fracture ("Grecnstiek " Fracture) of the Clavicle 501 Impacted Fracture of the Neck of the Femui' (Stimson) 502 Varieties of Displacement of the Fragments in Cases of Fracture 503 Fibrous Union after Fracture of the Patella (Stimson) 504 Deformity following Fracture of the Jjeg near the Ankle (Stimson) .... 505 The First Strip (Sayre's Dressing for Fractured Clavicle) 508 Sayre's Dressing for Fractured ("lavicle (Front View) 509 Sayre's Second Strip for Fractured Clavicle (Back View) 509 Colles's Fracture, Silver-fork Deformity in Fracture of the Lower End of the Radius (Stimson) 511 Apparatus for making Continuous Extension in Fracture of the Femur . . .514 Wire or Wooden Screen to keep the Bcdclothing from resting upon Fractured Limbs 515 Agnew's Splint for Fracture of the Patella (Agnew) 516 Plaster-of-Paris Dressing in Fracture of the Leg 518 Deformity in Pott's Fracture (Stimson) 519 Four-tailed Bandage for Fracture of ihc Lower Jaw (Stimson) 520 LIST OF ILLUSTRATIONS. xv Inward Dislocation of the Shoulder (Stimson) Digital Compression of Common Carotid Artci'y Line showing the Course of the Brachial Artery Digital Compression of the Brachial Artery . Digital Compression of the Femoral Artery . Flexion of the Thigh upon the Pelvis in Jlip-joint Disease Lordosis, or Bending Forward of the Spinal Column, in Hip Flexion of the Thigh and drooping of the Furrow below the Buttock on the AlTecled Side, in Ilip-joint Disease The Travois, or Indian Litter . Patient across Shoulder . Patient across Back . The Rifle Seat .... Two-handed Seat i'Af;H; . riVi . 577 . o77 . 58:^ . 584 joint Disease . . . 584 5M5 rm 504 5!i4 594 504 The Bacillus Anthracis (after De Bary) 624 The Bacillus Megaterium (after De Bary) 624 Young Malarial Parasite inside Red Blood-cell with Nucleus, no Pigment, magnified 1,000 634 Young Parasite inside Swollen Red Blood-cell, the Tips of the Crescent holding the Hyaline Nucleus, magnified 1,000 6o4 Fully developed Parasite, Rods of Pigment arranged in Round Areas, Nucleus indi- cated by Opening, also Vacuoles 635 A Urinometer (Tiemann) '. . . . 722 Cutting the Umbilical Cord 750 Making a Square Knot 750 A Nipple Shield (Davidson Rubber Co.) 701 Freeman Pasteurizer ari-anged for Heating Milk (James T. Dougherty) . . . 765 Freeman Pastuerizer arranged for Cooling Milk (James T. Dougherty) . . . 765 Hieks's Clinical Thermometer (Tiemann) 843 An Oxygen Flask 853 An Atomizer (Tiemann) 854 A Croup Kettle (Tiemann) 854 Screw-capped Ice Bag 855 A Rubber Ring . .- 855 A Glass Rod (Tiemann) 856 A Glass Dropper (Tiemann) 856 A Stomach Tube (Tiemann) 856 Hirudo Medicinalis, or Leech 867 A Hand-bulb Syringe (Tiemann) 868 Sylvester's Method of Artificial Respiration — First Movement (Inspiration) . . 870 Sylvester's Method of Artificial Respiration — Second Movement (Expiration) . . 870 An Iron Bedstead 904 Method of changing the Bed of a Helpless Patient 905 The Clean Sheet 906 Method of lifting Patient from one Bed to Another 910 A Back Rest Oil A Crane 912 A Portable Bath Tub .914 A Bath Thermometer (Tiemann) 015 A Cotton Ring 917 Temperature Chart 919 Bedside Notes 919 The Peerless Graduated Measure . . , • , 921 XVI LIST OF ILLUSTRATIONS. A Porcelain Feeding Cup A Glass Feeding Tube (Tieinann) A Bed Tray .... The Arnold Slerilizer (Wilmot Castle) The Curve of the Rectum A Test Tube (Tieniann) . A Stupe Wringer . Wet Pack: Fii-st Stage (after Baruch) Wet Pack : Second Stage " Wot Pack: Third Stage " An Ice Coil (Tieniann) An Ice Coil in Opemlion . SanitJiry Sputa Cup . Diagram of Sanitary Spula Cup Flannel Stocking for Use during Operations A Crescont-sha|icd Basin (Tieniann) Sanitary Najikin Aluloniinal Binder . Binder witli Shoulder Straps . Sloane Breast Binder The Sloane and Abdominal Binders applied The Y Breast Bandage in Position A Nursing Bottle A Nightingale: for the Use of an Invalid A Convalescent resting in a Steamer Chair PAQB . 934 . 924 . 925 . 925 . 938 . 937 . 940 . 941 . 941 . 942 . 942 . 943 . 94G . 947 . 950 . 951 . 954 . 957 , 958 . 958 . 958 . 959 . 9(53 . 908 . 9G9 COLOURED PLATES. I.— A Trained Nurse Frontispiece II.— A Dissection of the Human Body showing the Principal Organs and Vessels in the Abdominal and Thoracic Cavities 02 111.— Examples of Micro-organisms 024 IV.— Typical Cases of Measles (o) and Scarlet Fever (j3) 040 I. THE ANATOMY OF THE HUMAN BODY. By GEORGE WALDO CRARY, M. D. INTRODUCTION. Human anatomy is the science which treats of the structure of the human body. In the study of it we learn the identity and characteristic features of the various organs composing the body, and their location in relation to one another. Anatomy has but little to do with the functions of these organs, and hence can be studied upon the dead body with the aid of dissection. By dissection is meant the exposing of a structure by cutting away from it all other organs which by their presence obscure it from our view. SECTION I. THE BONES. The scaffolding or skeleton upon which the body is constructed is composed of bones and bears much the same relation to the whole as do the steel columns and beams to the modern building. These bones are joined together in a variety of ways ; in some cases very iirmly, for strength, in others loosely, for motion. Bone is the hardest structure entering into the formation of the body, and is composed of two kinds of tissue. One of these is soft and light, and is composed of slender fibres which are interlaced Structure of Bone. , , , ,, , .-,.-,. and have between them spaces oi considerable size. This, called the cancellous tissue, always occupies the inner portion of the bone and contributes much to its strength, while adding but little to its weight. The outer portion is hard and dense, like ivory, and is heavy, the fibres being very closely interlaced and the spaces exceedingly small. This outer compact layer is very thin in the flat bones, such as make up the vault of the head ; is thick along the middle of the long bones, as in 3 1 2 THE ANATOMY OF THE HUMAN BODY. the extremities; but ay;aiii thin near their ends. This latter condition is well shown in the accompanying illustration (Fig. 2) of along bone sawed through lengthwise, where it can be seen that the tibres are arranged ac- 7 cervical vertebraj. ^,„j„ Clavicle, or collar bone. Scapula, or shoulder-blade. .Bones of the carpus. >Si, . . Bones of the ' I* metacarpus. ■i\ . . Phalanges of the fingers. . . Bones of the tarsus. . . .Bones of the metatarsus. .Phalanges of the toes. Fio. 1.— The skei.kton. cording to the best mechanical laws for enabling the bone to perform its function of supporting weight. During life the bones are closely covered by a somewhat thick and tough membranous envelope called the periosteum, which protects the bone, and STRUCTURE AND COMPOSITION OF BONE. from which blood-vessels pass to the outer compact tissue of the bone, and thus to it is carried the nourishing; blood-supply. The inner, softer tissue receives nourishment from vessels which reach it after perforating the outer layer. The long bones are hollow cylinders the cavities of which contain marrow — a yellow substance composed almost entirely of fat. In the interior of the fiat bones is another kind of marrow which is red and contains only a trace of fat and which consists mostly of water, with a little albumen and some other substances. Chemically, bone consists, in the healthy adult, of one third animal matter and two thirds mineral matter, so intimately combined that either one may be removed without the shape or size of the ^ ., . bone beinff altered. The mineral matter gives to the Composition. _ ^ o bone its hardness and rigidity, while the toughness and elasticity are contributed by the animal matter. For example, if we soak a long bone in dilute mineral acid so as to dissolve out the mineral matter, though its appearance will be little changed, it will become soft and pliable and can even be tied into a knot, as the illustration shows (Fig. 3). If we put a long bone in the fire and de- stroy the animal matter contained in it, we shall find that we have left a bone somewhat less heavy, but which will break and crumble unless very carefully handled. The bones of young children contain more animal than mineral matter, and frequently a fall which would result in broken bones in the adult causes no harm at all, or only a bending of a bone, in a child. Such a bending or partial break of a bone is known as a " green-stick " fracture. In some diseases, such as rickets, this preponderance of ani- mal matter is so great that the bones are weakened and become curved and bent by the weight of the body or by the action of muscles. At a verj^ earl}^ period of life, and some months before birth, the bones are composed entirely of animal matter. Then, at one or more points in each bone the mineral sub- stance begins to be deposited, and from these points the deposits gradually extend until at length the whole bone becomes what is called " ossified." This process is very incomplete at birth and is not finished until about the twenty-fifth year. In the aged, and in certain diseases, the proportion of mineral matter increases beyond the normal two thirds, and the bones become brittle and are easily broken by sudden movements or by slight violence. Fig. 2. — The kight fe- mur, OR THIGH-BOXE, SAWN IX TWO LENGTH- WISE, SHOWING AR- RANGEiCENT OF COM- PACT AND CANCELLOUS TISSUE. THE ANATOMY OF THE HUMAN BODY. Tliere are two liundred bones in the human body, and wlicn joined together they form tlie skeleton. Tliese bones are distributed thus: Spinal column 26 Skull........ 22 llyoid bone, breast bone, and i-ihs 26 Upper extremities 64 Lower extremities 62 200 The bones vary widely in size, shape, and position, according to their use, but are largely arranged in pairs, so that of these two hundred bones there are one hundred and sixty-six in pairs ; and of the . , thirtv-four sino:le bones, all are in the median plane of Arrangement. • . . . the body and have a right and a left half of similar shape. According to their shape, bones are said to be long, short, flat, or irregular. Long bones, as the bone of the arm or of the thigh, are com- posed of a middle long portion called the "' shaft " and two ends called " extremities." The short bones are such as are found in the wrist. The flat bones are found where broad surfaces are required for protection or for muscular /i attachment. Flat bones are bones the length and breadth of which greatly exceed their thickness — the shoulder-blade, for example. The bones of the vault of the skull are of this variety. Bones which are not I '| ' long, short, or flat are classified as irregular, and some ' ' of the bones of the skull — such as the cheek bones, the lower jaw, etc. — come under this heading. The spinal column or backbone is composed, in the Tj V- adult, of twenty-six irregular bones, called vertebrte, placed one above another. It is di- J^^ The Spine. • i i • ^ n i j • ,i vided into well-marked regions — the neck or cervical region, containing seven vertebrae ; the dorsal or chest region, containing twelve ; and the lumbar or loin region, containing five ; below this comes Fm. 3.— Fibula tied the sacrum, formed by the fusion of five vertebne which mackration m a are distinct in early life ; and still lower down the ""'spkc^men ^prT coccyx, composed of the fusion of four partly devel- fi)"iJ'on )^ ^^"*'''- oped vertebrae. While a vertebra from one end of the spine differs much from one taken from the other end, two contiguous vertebrte differ only slightly. Each vertebra is composed of a solid front portion or body and a branched back portion, which latter encloses a ring (Fig. 4). If we remove from about the middle of the spine a vertebra and study it, we shall see that the solid portion or body has an upper and THE SPINAL COLUMN. SPINOUS PROCESS lower surface, wliich is flat and roui^h, for the attaclirnent of the inter- vertebral substances which connect it to the vertebrte above and below it. In front it is rounded, and behind slif^htly hollowed out where it assists in form- ing the spinal canal. Pro- jecting backward from each side of the body, and nearer its upper than its lower surface, we see a pro- cess of bone which forms the beginning of the arched portion. These are called the pedicles. The arch is completed by two plates called the laminae, which spring, one from each pedi- cle, and join in the median line be- FiG. 4. — Sixth dorsal vertebra, from above. (Quain.) hind. At this point of junction of the two laminse behind there is another process of bone known as the spine of the vertebra, and it is the ends of these processes which we can feel as we pass our finger down the middle of some one's back. There are six other processes of bone springing from this branched portion — four for articulation with other vertebras and two for muscular attachment. The solid portions, taken together with the inter- vertebral substance, or cushions of dense fibrous material between them, form a strong column which supports the great bony cavities of the body. The back and branched portions form a series of arches called the spinal canal, for the passage of the spinal cord, which is thus strongly protected. Be- sides supporting weight and protecting the cord, the spinal column gives numerous places of attachment to muscles which move the body itself and the extremities. When we look at the spinal column from the side we see that it is curved in four places. These curves are for the purpose of giving greater elasticity to the column, thereby enabling it to bear greater shocks, and without 80 much disturbance to the structures supported by it. lateral aspect. ' Curves of the Spine. < 6 THE ANATOMY OF THE HUMAN BODY. They are formed by the shape, partly, of the bodies of the vertebn\% and partly of the intervertebral substances, and are so arranged as to increase the capacity of the two great bony cavities partially formed by the spine — namely, the chest and pelvis. In the cervical, or neck, and in the lumbar or loin regions, the convexity is forward, while in the dorsal, or chest, and in the pelvic regions formed by the sacrum and coccyx, the concavity is forward. The disks of intervertebral substance existing between the bodies of the vertebrte are tough and elastic and, while forming strong bonds of union between the vertebras, act as cushions and allow Interveriebml ^^^^^^ movement to take place. This movement is small Substance. , , • i • i i between any two vertebrae, but in the spme, as a whole, is rather extensive. During the day the body is said to lose in height and to retrain it auain during repose in a horizontal position. This loss is due parti V to some flattening of each intervertebral disk and partly to the in- crease in the normal curves of the spine. The aged lose in height from the same and other causes. In that condition of the spine known as Tott's disease (or spinal disease) the bodies of one or more vertebrae are so soft- ened that the weight of that portion of the body above them causes them to collapse, and then the normal curve is enormously increased and the body much shortened in consequence. Such a course of events results in the condition known as hii7nj) hack. (See Surgical Injuries and Surgical Diseases.) THE SKULL. Of the twenty-two bones of the skull, eight go to make up the head or cranium, which is the bony box in which the brain is lodged and protected from ini'ury. In the adult this is closed, with the excep- ^ "' . tion of one large openino; for the passage of the spinal 07- Cranium. or o r o r ^ cord, and numerous small openings for the transmission of nerves and blood-vessels ; but in the infant, owing to the fact that ossifi- cation is not complete, there is left on top, toward the forehead, a large, diamond-shaped opening, " the soft spot " (through which the pulsations of the arteries of the brain may be felt), and five other small openings, two upon each side and one near the back of the head. (See Fig. Y.) This slow ossification of the bones of the head allows for the growth of the brain ; a child born without any of these openings is apt to be idiotic, have convulsions, and may even die. A full and detailed description of the individual bones of the head cannot be given in a work of this kind, and nothing beyond an enumera- tion of them and their most striking peculiarities and position will be attempted. The eight bones are : One occipital, two parietal, one frontal, two temporal, one sphenoid, and one ethmoid. The occipital, shaped THE BONES OF THE HEAD. 7 something like a butter scoop, such as is used in a dairy, with a hole in the bowl and a l)roken handle, occupies the back of the head. This large hole, the foramen magnum, is nearer the front than the Occipital, Parietal, back and corresponds to the spinal canal in the vertebral Frontal, Tempo- gQi^j^n, and transmits the spinal cord and a few nerves ral, Sphenoid, and , , . tt i • i r it,- j: i a Ethmoid Bones. ^"^^ arteries. Upon each side of this foramen, but near its front border, is a kidney-shaped, smooth surface, which articulates with similar surfaces upon the sides of the first cervical vertebrae. There are two parietal bones — a right and left. They are of a curved quadrilateral shape and form most of the roof and a great por- OCCIPITAL Fig. 6. — The skull. tion of the sides of the cranium. The frontal bone much resembles a cockle shell in form and consists of two portions which join at nearly a right angle. The vertical or frontal portion forms the forehead and the front wall of the cranial box. The horizontal portion extends backward, forming the roofs of the cavities for the eyes, known as the orbits, and also a part of the roof of the nasal cavity. In the young the bone is divided into two lateral halves, and even in late adult life the remains of this divis- ion may be seen. The temporal bone is divided for description into three portions : One, a thin plate of bone, assists in forming the side of the cra- nium ; another, the mastoid, forms the prominence which can be felt back 8 THE ANATOMY OF THE HUMAN BODY. of the ear, and is hollowed out in its intorior by a number of cavities which have a connection with the middle ear, and in active cases of neglected ear disease become seriously involved in the intlammation ; the third portion of the temporal bone is of an irregular conical shape and assists in forming the base of the skull, and contains within it the organ of hearing and the canal leading from the middle ear to the outer world. The sphenoid bone, the most irregular bone in the head, is shaped something like a bat with its wings spread. The central portion or body enters into the formation of the base of the skull. The outer surfaces of the great wings, upon each side of the skull, appear upon the outer surface of the cranium at about FiQ. 7.-SKILL OF A CHILD ^]^q poj^t ordluarlly called the " temple." The AT BIKTIl, FROM ABOVE. "^ -^ _ ' (Leisiiman.) One tiiikd. inner surface of these wings forms the back part ''■ «."poJ?eKor SnSeiie ! of the outcr walls of the orbits. This bone is i A, parietal eminences, ^ygdgcd into the base of the skull and has manv (Quain.) *= _ ^ ■' processes which serve to connect it with many of the other bones both of the head and face. The ethmoid bone is a light, spongy bone situated at the front part of the base of the skull, between the orbits, and forms the greater part of the inner walls of these cavities. It also forms part of the septum, or dividing partition between the two nasal cavities, as well as a portion of their roof. The bones of the face are : Two nasal, two superior maxillary, two lachrvmal, two malar, two palate bones, two inferior turbinated, one vomer, and one inferior maxillary bone. The nasal onef, of e ace. ^^^^^ form together the " bridge " of the nose. The superior maxillary is the upper jaw. It forms almost all of the floor of the orbit, the greater part of the outer walls of the nasal fossa, and the major part of the roof of the mouth. Into it are inserted the upper teeth. The palate bones join on to the back of the superior maxillfe and complete the floor of the orbits, the outer walls of the nasal cavities or fossae, and the roof of the mouth, but are too far back to have any of the teeth inserted into them. The lachrymal bones are small and fragile, about the size of a finger-nail, and are placed upon the inner walls of the orbits very near the front. The malar bones form the prominence of the cheek, and in the thin and emaciated are especially noticeable. The turbinated bones are situated one upon the outer wall of each nasal fossa, and are frequently nowadays the subjects of operation by specialists be- cause of undue enlargement. The vomer is a thin plate of bone which assists the ethmoid in separating the two nasal cavities one from the other. The inferior maxillary, or lower jaw, is of irregular horseshoe shape, with the ends bent upward at almost a right angle. These ends ARRANGEMENT AND ATTACHMENT OF THE RIBS. 9 are surmonnted by two prominences. The one in front is pointed, and gives attachment to tlie strong temporal muscle which closes the jaw. The one behind is of somewhat rounded shape at tlie top, and is called the condyle. It is constricted below where it joins the bone, and this constricted portion is called the nech of the condyle. This is the one bone of the skull which is movable, and it articulates, by means of this condyle, with a shallow cavity upon the under surface of the temporal bone just in front of the ear. Into the lower jaw are set the lower teeth. The jawbone in the young is composed of a right and left piece which meet at the chin. It will thus be seen that of the fourteen bones of tlie face there are twelve occurring in six pairs, and only two which are single bones — viz., the vomer and the inferior maxillary. THE RIBS. There are twenty-four ribs, twelve upon each side of the chest. All are connected behind with the dorsal vertebras of the spine in such a way 3 2 Fig. 8. — Thorax, anterior view. (Sappey.) 1, 2, 3, sternum ; 4, circumference of the up- per portion of the thorax ; 5, circumfer- ence of the base of the thorax ; 6, first rib ; 7, second rib ; 8, third rib ; 9, 10, floating ribs ; 11, costal cartilages. Fig. 9. — Thorax, posterior view. (Sappey.) 1, 1, spinous processes of the dorsal verte- brffi ; 2, 2, laminte of the vertebrse ; 3, 3, transverse processes : 4. 4, dorsal portions of the ribs ; 5, 5, angles of the ribs. as to allow considerable motion. The upper seven are connected in front with the breast bone or sternum, and are called true ribs. Of the remain- ing five or false ribs the upper three ard too short to reach the sternum, and each one is connected in front with the rib just above it ; the two lower ribs are not attached to anything in front, being very short, and are called floating ribs. The ribs are arranged one below another in such a manner 10 THE ANATOMY OF THE HUMAN BODY. that spaces are left between tlieni called " intercostal spaces." The ribs are not composed entirely of bone, for their front extremities are formed of cartilafje, which arrangement adds elasticity to the chest wall. This cartilage is a snbstance softer than bone, bnt of linn consistence and con- siderable elasticity; and is of a pearly white colour. Besides forming the front ends of the ribs, cartilage covers the articular ends of the bones, and forms the framework of the outer ear and most of the nose. THE UPPER EXTREMITY. The upper extremity consists of the arm, forearm, and hand, and is connected with the body at the shoulder. The bones of the shoulder are two in number — the collar bone or clavicle and the aiu e^rnu shoulder-blade or scapula. The collar bone is shaped something like the Italic letter /. It is nearly hori- zontal, and by its inner end joins the breast bone near the top, form- ing here a movable joint. This joint is the only hony connection the iq^jM'/' extremity has with the body. The outer end of the clavicle is attached to that portion of the shoulder-blade which arches up to meet Fig. 10. — Upper sukface of left clavicle, or collar bone. it. The shoulder-blade or scapula, a large flat bone of somewhat trian- gular shape, forms the back of the shoulder, and is held in position most largely by muscles. From the back of this bone a large process or plate of bone arches upward and forward, forming what is known as the spine of the scapula. The end of this process of bone or " spine " forms the summit or "point" of the shoulder, and joins with the outer end of the clavicle, as mentioned above. The upper and outer angle of the scapula is thick, and is called the head of the bone. It is occu- pied by a shallow cup for the reception of the head of the bone of the arm which joins it at this place. This cup itself is very shallow, but the spine already mentioned, and another smaller process of bone called the coracoid process, which springs from the scapula just above its head, make it practically deejier than it appears. These processes of the scapula arch over the cup for the head of the bone of the arm, and render the joint more secure. In the arm proper or upper arm there is only one bone, the humerus. It is the longest and largest l)one of the upper extremity, and its shape is THE SURGICAL NECK OF THE HUMERUS. 11 somewhat suggestive of a dumb-bell with small ends and a long liandle. Only the upper end, however, is distinctly globular, and this globular end, called the head of the humerus, represents one umerus. third of a sphere, and fits into the shallow cup or socket in the head of the shoulder-blade. At this upper end we have also two rough prominences or tuberosities for the attachment of muscles, and Fig. 11. — Left scapula, or shoulder-blade. between them a groove for the passage of one of the tendons of the biceps muscle. Just below these tuberosities the shaft of the bone is somewhat constricted, and it is here that fracture or break of the bone most frequently occurs. This is called, therefore, the surgical neck of the humerus. The lower extremity of this bone is somewhat flattened from before backward, and thus appears wider when looked at from in front or behind than from the side. The lower extremity has a rough knob of bone upon either side for muscular attachment. Along the mid- 12 THE ANATOMY OF THE HUMAN BODY. die of this lower end of the humerus are two smooth surfaces, one of which, the radial head, is round and situated toward the outer side. This surface has artifulating with it the upper end of the (uiter hone of the €-^ ■/V" /f ^ TROCHLEA RADIAL HEAD Fig. 12. — Left humeru.«. Fig. ARTIC WITH SEMILUNAR AND SCAPHOID OF CARPUS 18. — Lkkt radius and ulna, or bones ok the forearm. forearm. The other of the two smooth surfaces, the trochlea, is on the inner side, and is curved for articulation with the inner bone of the forearm. THE BONES OF THE FOREARM. 13 The inner bone of the forearm is called the ulna. Its upper extrem- ity is large while its lower extremity is small. In most long bones the smooth surfaces by which they -join or articulate with Ulna and Ramus. , , , , , , , i , . , otlier bones are at the extreme ends, but in the upper extremity of the ulna the smooth surface for articulation with the hu- merus is hollowed out of the front portion at a little distance from the end. The lower extremity of the ulna is small and somewhat pointed. ARTICULATE WITH RADIUS FORMING WRIST JOINT CARPUS METACARPUS Fig. 14. — Bones of the left hand ; palmak surface. 14 THE ANATOMY OF THE HUMAN BODY. The outer bone of the forearm is the radius. In this bone the upper end is small while the lower end is very large and broad, and to it the wrist and hand are joined. This bone is the one that supports nearly all the pressure brought to bear upon the hand, and hence is frequently broken by falling upon the hands. (See Fig. 26, Surgical Injurit's and Surgical Dis- eases.) The wrist is composed of eight cube- shaped bones arranged in two rows. The lirst row joins above with the lower ex- „, „ tremity of the radius, The Hand. . , ^ ... ' and below with the sec- ond row ; the second row joins above with tlie first row, and below with the metacarpal bones. These latter are five rather long bones arranged nearly parallel to each other. They are very similar in shape to the bones forming the fingers, but are connected together in such a way as to form a more or less solid portion of the hand. The first one of these bones makes an angle with the rest, and to it the thumb is attached. This bone is so joined to the wrist bones that in closing the hand it can be carried over in front of the other fingers, and when the hand is only par- tially closed it can be approximated to any of the other fingers. The power and perfection of the human hand, and its superiority over the prehensile members of all other animals, result from this unique ability of the thumb to approxi- mate itself to the other fingers of the hand. To the second bone of the hand proper the index finger is attached, to the third the middle finger, to the fourth the ring finger, and to the fifth the little finger. In the fingers there are four- teen bones, three for each finger and two for the thumb. The end bone of each set is differently shaped from the other two, and supports the pulp of the finger tips. Fio. 15. — Kuiiri' f?;mi:i{, oit tiiioii bonk. HIP BONES, FEMUE, AND BONES OF THE LEfi. THE LOWER EXTREMITY. The lower extremity consists of tlie thigh, the log, and the foot, and is connected to the body on each side by means of tlie hip bone. These two irregular hip bones, one on each side of the body, were called by the old anatomists the innominate, or nameless bones, because they bore no resemblance to any known object. In the young, each innominate bone consists of three portions joined together near the centre, and here forming a cup-shaped cavity or socket for the reception of the head of the thigh bone. Of these three por- tions, the upper forms the prominence of the hip. Of the two remaining, one is behind and forms the prominence upon which the body rests in sitting, while the other joins in front of the body with the similar por- tion of the opposite bone, and thus forms what is known as the pubes, so called because in the adult it is covered with hair. Each innominate bone is joined behind to the sacrum, and thus a somewhat incomplete bony basin or cavity called the pelvis is formed, which contains the lower portions of the bowels, the bladder, and, in the female, the vagina, the uterus, and the ovaries. The thigh bone, or femur, extends from the hip to the knee, and is the longest, the largest, and the strongest bone in the body. At its upper end we find a smooth rounded head which forms three quarters of a sphere. This head is connected to the shaft of the femur by means of the neck at an obtuse angle of about a hundred and thirty degrees. At the junction of the neck and the shaft we have two large processes of bone, called the tuberosities, for muscular attachment. The shaft of the bone in the greater portion of its extent is nearly cylindrical in shape. At the lower end of the shaft we find that the bone is much en- larged for articulation with the large bone of the leg, here forming the knee joint. The knee cap, or patella, is a small, smooth, rounded bone which protects the front of the knee joint from injury ^'^' ^*^'~2^^ .™''''^' °" and assists the large muscles of the thigh that KNEE CAP. O & pass in front of the joint to act upon the leg, as in kicking or walking. In the leg there are two bones, though one, the fibula, is slender and adds but little to the strength of the leg, serving mostly as a place of attachment for some of the muscles that move the foot. It is placed on the outer side of the leg and extends downward to form the outer ankle. The larger of the two bones of the leg — viz., the tibia — is situated on the inner side of the leg and somewhat 16 THE ANATOMY OF THE HUMAN BODY. iu front of the fibula. It has a broad upper end for articulation with the femur and a smaller lower end for articulation with the foot. This lower end is continued downward somewhat beloAv the joint, and forms the Fig. 17. — Right tibia, or shin bone, and kibula ok .splint bone; ante- kior surface. Fig. 18. — Bones of right foot ; dorsal SURFACE. inner ankle. The shaft of the bone is triangular upon cross section, with its sharp edge in front, commonly known as the shin. The foot is formed of twenty-six bones. Seven of these are nearly cuboid in shape, and are clustered together Foot. FUNCTIONS OF THE JOINTS. 17 somewhat after the fashion of the bones of the wrist. The rest of the foot is similar to the hand, with the important exception that the great toe cannot be " approximated " to the others, as is the case witli the thumb in the hand. The bones of the toes, also, ai-e shortc]- than the bones of the fingers. SECTION 11. THE JOINTS. The various bones of the skeleton are united by what are called joints, or articulations. When no motion between the bones is required, as in ^, . ,. ^ -r . , the head, they are brought into close contact and V CtT'hPt'i ^ S of fJ0'i71 /S dovetailed into one another in what are called sutures. Such a joint is known as an immovable joint. Where great motion is required, as in the shoulder joint, for example, the ends of the bones are covered by a smooth layer of cartilage. This elastic substance renders the motion between the bones smooth and easy, and protects the ends of the bones from injury. In snch a joint the bones are held together in their proper relation to one another, and their motion is limited by numerous bundles of white shining fibres called ligaments. These liga- ments usually surround the joint completely, thus forming what is called the capsular ligament, or capsule, and they are especially strong where the greater strain is to be resisted. The ligaments are tough and inextensile, but they are very pliable, thus allowing movement to take place freely, but within limits sharply controlled by their length or position. The in- ternal surface of the capsule or of any ligament in close relation to a joint is lined by a smooth and delicate membrane called the synovial membrane, which secretes a viscid fluid of the consistence of the white of egg. This fluid is the lubricant of the joints, and is called synovia, or sjmovial fluid. Such a joint as this just described is designated as a movable joint. A joint which is not freely movable, but which allows slight motion to take place, as between the bones of the spine, is spoken of as a mixed articu- lation. Of the movable there are two principal varieties. One of these is the " ball-and-socket " joint, formed by the reception of a globular head into a cup shaped cavity, and capable of motion in all directions. The hip and shoulder joints are examples of this variety. (See Fig. 20.) The other variety of movable joints is the " hinge " joint, and in this motion takes place only in two directions — viz., forward and backward. As examples of the hinge joint we have the elbow, the knee, and the ankle. (See Fig. 19.) Joints are further strengthened by the muscles and tendons which surround and pass over them. In order to bring out 4 IS THE ANATOMY OF THE HUMAN BODY, more vividly the structure of joints, we will look more minutely into certain of them and study somethino- of their detail. Let us take first the articulation of the inferior nuixilla with the temixtral hone. v._ Flo. 19, A. — KlGIlT KNEE JOINT, FROM THE INNER SIDE AND ANTERIORLY. (Quuiu.) 1, tendon of the rectus muscle near its insertion into tlie patella: 2, insertion of the vastus internus into the rectus tendon and side of the patelhi ; 3, lisraiuentuni patelUo tlesreiidlnfr to tlie tubercle of the tibia ; 4, capsular fibres forming a lateral ligament of the patella prolonged in part from the insertion of the vastus internus downward toward the inner tuiaerosity of the tibia; 5, internal lateral ligament; 6, tendon of the semimembranosus muscle. Fig. 19, B. — Right knee joint, fro.m behind. (Quain.) 1, insertion of tlie tendon of the adductor magnus; 2, origin of the inner head of the gastrocnemius muscle; 3, outer head of the same; 4, e.xternal lateral ligament; 5, tendon of the po]iliteus muscle; 6, part of internal lateral ligament; 7, tendon of the semimembranosus muscle; H, i)Os- terior ligament, spreading outward from the tendon ; 9, expansion of the popliteal fascia down- ward from the same, represented as cut short; 10, on the head of the fibula, marks the posterior superior tibio-fibular ligament; 11, upper part of the interosseous membrane with the foramen at the upper end for the anterior tibial vessels. On account of its peculiar shape, the jaw has two articulations, a right and a left, but as they are alike on both sides, it will be necessary to describe only one. There is a smooth rounded process of bone upon the upper and back part of the inferior maxillary, or jawbone, which is called the condyle. This condyle fits into a shallow cavity upon the under surface of the temporal bone, and the surfaces both of the condyle of the jaw and of the shallow cavity of the temporal are covered by a laj^er of smooth cartilage. The articulation of the jaw is different from most of the joints of the body, in that the bones entering into it do not come into mutual contact. There is a disk lying horizontally between them made up of firm elastic tissue, so that the condyle of the jaw articulates with its under surface, while the Jmv. THE JAW AND HIP JOINT. 10 upper surface articulates with tlic cavity of tli(; teinporal. The cavity of the joint is thus completely divided into two compartments. The whole joint is surrounded by a thin layer of ligamentous fibres which are attached above to the margins of the cavity of the temporal, and below to the constricted portion, or neck, of the condyle. This is the capsular ligament, and to its internal surface the disk of elastic tissue referred to above is attached at its circumference. Upon the outer side of this articulation is the external lateral ligament, a short but strong band of fibres, passing from the temporal bone downward to the jaw, and closely connected to the capsule. The interior surfaces of the capsule and of the external lateral ligament, and the upper and lower surfaces of the fibrous disk, are lined by synovial membrane. Upon the inner side of the joint is the internal lateral ligament, longer than the external lateral. This internal lateral ligament is not in close relation to the joint, being separated from the capsular ligament by a considerable interval. This articulation allows of considerable motion, whicli takes place in three directions, as shown in the (1) opening of the jaw, (2) throwing the chin forward and drawing it back, and (3) moving the jaw from side to side. In wide yawning sometimes the condyle of the jaw is carried forward out of the cavity of the temporal bone and becomes caught so that its return is pre- vented. This renders it impossible to close the mouth, and results in the condition of dislocation of the jaw, an accident distressing to the sufferer, who, however, presents a somewhat ludicrous appearance. This condition usually requires the presence of a surgeon for its relief. The rounded head of the thigh bone or femur fits into a deep cup- shaped cavity or socket in the hip bone, thus form- ing a ball-and- socket joint. The joint surfaces of the bones are covered by smooth cartilage, and the bones are con- nected by a strong capsular ligament which entirely surrounds the joint. In positions where an excessive strain is apt to be developed this capsule is further strengthened by large bundles of ligamentous fibres. The cap- sule is connected above with the rim of the socket in the innominate, or Hip Joint. Fig. 20. — A section of the hip joivr taexn THROUGH THE ACETABULUM OK ARTICCLAK CUP OF THE PELVIS AXD THE MIDDLE OF THE HEAD AND NECK OF THE THIGH BONE. 20 THE ANATOMY OF THE HUMAN BODY. hip bone, and below with the neck of the femur, or thigh bone. Its inner surface is Hned with synovial membrane. In the interior of tlie joint is another ligament, called the round ligament, passing from about the middle of the head of the femur to a rough depression at the bottom of the socket of the innominate. It is lined with synovial membrane, and plavs but little part in luilding the bones in place or in checking motion of the femur. ^lovement in this joint is in all directions, but is not as free as in the shoulder joint. The joint is rendered more secure and protected from injury by the large mass of muscle that surrounds it. On account of the gi-eat strength of the ligaments of this joint, disloca- tion of the head from its socket is rare, the femur itself more frequently breaking, while the ligaments hold firm. Dislocation of this joint, how- ever, does sometimes take place, most commonly in adult life. In rare instances dislocation of this joint on one or both sides is found at birth, the accident having taken place during intra-uterine life. SECTION III. THE MUSCLES. The great mass of the body is made up of the muscles, which form what is called flesh or meat. In athletic persons, in whom the mnscles are well developed and are not covered with fat, they contribute most largely to the shape and weight of the body. The muscles are the organs of movement, and are made of reddish fibres having the power of con- tractility. There are two kinds of muscles: voluntary, or those under control of the will, and involuntary, or those over which the will has little or no control. The muscles of the arm or leg are examples of voluntary muscles, while the muscular fibres found in the l)Owels are of the involun- tary variety. When we look at a voluntary muscle we find it to be made of bun- dles called the fasciculi, which in turn are composed of fibres. Examined under a microscope, each fibre is found to be marked by bands, or striae, which run transversely or crosswise. From the appearance of these strife, the term striped is applied to the voluntary muscles. If this muscular fibre be hardened in alcohol it will be further broken up into wdiat are called fibrillae. If we expose the fibre to the action of dilute acid, it will be broken up ti-ansversely into a series of disks or plates (Fig. 22). The muscles, according to their intended use, are attached (1) by both ends to different bones ; or (2) by one end to bone and by the other to some other organ of the body, as the skin ; or (3) they may not be attached to bone at all, as is the case with MUSCLES AND TENDONS. 21 some of the muscles of expression in the face. Muscles are rarely attached directly, but usually through the medium of what are known as sinews or tendons. The tendons hy which they are attaclied to the organ they are designed to move are white, glistening, fibrous cords, Fig. 21. — The muscular system. inelastic and strong. They vary much in size and length, according to the size of the muscle of which they form a part and the distance of this muscle from the bone or other organ upon which it is designed to act. 22 THE ANATOMY OF THE HUMAN BODY. Arlt07i. T^ouglily 8i)eakin<2;, ti muscular fibre can contract until it is two tliirds of its original U-ngtli. The contraction of a muscle causes the distance between the two tendon ends to be shortened, and hence, one end being fixed and lieki immovable, the other ou(], with everything directly or indirectly attached to it, will be made to move. Muscles held in a state of active contraction very soon become tired, but in healthy •A ^kt^Z.^ individuals, when the fa- tigue is not excessive, they regain their full power after a short rest. This is true of both voluntary and in- voluntary muscles, and even the nmscle of tlie heart, which seems to be in such constant action, really has a short period of rest after each beat. Besides this active contraction, which gives rise to motion, healthy muscles maintain almost constantly during con- sciousness a condition of passive contraction. This passive action of the mus- cles assists much in giving proper firmness to the body and extremities, and keeps the head and neck properly poised. With the exception of the knee and of the foot below the ankle, all movements forward are known as " flexion " and all movements backward as " extension." In some muscles passing over only one joint the action is very simple, being limited either to ])lain flexion or extension. But many of the muscles by aid of their tendons pass over more tlian one joint, and then their action becomes much more complicated. One of the muscles most commonly spoken of is the biceps, Mdiich oc- cupies the front portion of the arm (Fig. 23). This muscle is attached above by two tendons, from which fact it derives its name of biceps. The shorter of these two tendons, which is on the iimer side, is attached to that portion of bone, the cora- coid process, which arches up from the shoulder-blade or scapula, and of Fui. -l-i. !i muscular fibre, devoid of narcolenima, and breaking up at one end into its fibrill* ; B, separate fibrillae ; C, a muscular fibre breaking up into disks; D, a mus- cular fibre, the contractile substance of wliich (a) is torn, while the sarcolcmnia (A) has not given way. (Magnified about three hundred and fifty diameters.) Movements. Birpps. ACTION OF THE BICEPS MUSCLE. which mention has been made in tlie description of that bone. The otlier of the two tendons lies to the outer side of the short tendon. 'J'his, the long tendon of the biceps, passes over the shoulder joint, within the cap- sular ligament, and is attached to the upper rim of the shallow cup in the head of the scapula. To tliese two tendons the muscular portion or belly of the muscle is attached. The biceps muscle terminates below, a little above the bend of the elbow, in a single tendon, which passes downward in front of the elbow joint into the forearm, and is attached, to the radius near its upper end and upon its inner side. This muscle can do many things according to what portions of the body or of the upper extremity are rendered fixed or immovable by the action of other muscles. We shall now study some of these movements upon the right side. If we keep our left hand upon the right biceps we may feel the muscle con- tract when its action is being brought into play. If the body, shoulder, and arm are held still and the hand kept from turning, when the muscle acts it will simply flex the forearm upon the arm at the elbow joint. If the forearm is now held at right angles with the arm, and the palm of the hand turned downward, contraction of the biceps will turn the forearm over so that the palm of the hand will look upward. This action is called outward rotation, or supination of the forearm. While other muscles assist in these move- ments, the biceps is the strong- est factor in producing them. Because the upper tendons of the biceps pass over the shoulder joint, from their points of attachment on the scapula, to join the muscle, the action of the biceps assists in raising the whole upper ex- tremity, and the whole action of the muscle is well shown during the using of a screw-driver, when the arm is raised at right angles with the body at the shoulder joint, the fore- arm flexed on the arm at the elbow, and the hand forcibly rotated out- ward in the act of driving a screw home. If, by grasping with firm hold upon some object, such as the limb of a tree, we fix the hand and forearm immovably, and then contract the biceps, these movements will be somewhat reversed ; the arm will be fiexed upon the forearm and the whole body Avill be carried along, so that if the limb of the tree of which we have hold is above the head, the body will be lifted from the ground. A peculiar muscle in its shape and action is the diaphragm. This muscle is broad and thin, being shaped something like a palm-leaf fan Fig. 23.- -The bones of the upper extremity with THE biceps muscle. 2i THE ANATOMY OF THE HUMAN BODY. don. with the handle bent at rii;;ht angles. It forms the partitiDii wall between the chest cavity or thorax and the belly cavity or abdomen. The central portion of this lari^e leaf consists of tendinous fibres, Diaphragm. i ., i i "\lm t i- ^ • ^ while the muscular iibres radiate irom this central ten- These muscular fibres are attached by their outer ends to the inside of the chest wall, and are connected in an oblique line with the breast bone in front, the lower six ribs at the sides, and the spine in the lumbar region be- liind. The diaphragm is per- forated by three large openings : one for the great artery, the aorta ; one for the large vein coming from the lower part of the body and the lower extremities, the in- ferior vena cava ; and the third for the gullet or oesophagus, as it passes down to reach the stom- ach. It is also perforated by smaller openings for the passage of other struc- tures, such as nerves and small blood-vessels. The diaphragm is one of the muscles by which we breathe. When it is re- laxed it arches up in the middle from its many points of attachment, so as to present a dome-like appearance ; but when its muscular fibres con- tract, this curve becomes lessened and the dome is lowered, thus elonga- ting the cavity of the chest or thorax and enlarging its capacity. At the same time the contents of the abdomen are pushed downward and the belly walls made to l)ulge forward. When this action occurs the lungs are expanded by the air which is forced into them from above through the mouth, and we have thus drawn in a breath. When we breathe out, an act performed by other muscles, the diaphragm plays a negative part and is relaxed and pushed up into its dome-shape by the organs of the abdomen, which have been forced upward by the action of the abdominal muscles. Fig. 24. — The diapiikagm. a, the ensiform cartilage; 6, the central tendon; c, the open- inir for the oesophagus; d., the left leaflet; «, the opening for the aorta ; ./, the left crus ; g, psoas magnus ; /t, trans- versalis: t, quadratus lutnboruni ; k, ligamentum arcua- tuni externum : Z, ligamentum arcuatum internum; m, the right leaflet; w, the opening for the vena cava; o, the middle leatiet; /), the right crus. THE CIRCULATION OF THE JiLOOD. 25 Heart. The strongest tendon in the body is tliat \)y which tlie rnusclcB form- ing the calf of tlie leg are fastened to the hone of the lieol, and which is named the "tendo Achillis." Jt is six inches long and Stronger Tendon ,i • i i ^ i • i i , ^,^ , , ' . of the Body ^^^^ thick and strong, being able to withstand the strain of over one thousand pounds. Jt receives its name from Achilles, the hero of the ancient Greeks, who, according to the old legend, was dipped into the river Styx by his mother and thus rendered invul- nerable, except in the heel by which he had been grasped during the ducking. SECTION ly. ARTERIES, VEINS, AND CAPILLARIES. The circulation of the blood through all portions of the body is car- ried on by means of (1) the heart, (2) the arteries, (3) the veins, and (4j the capillaries. The last serve to connect the arteries and veins together. The heart is the force-pump by which the constant current of the blood is maintained. It really consists of two pumps, a right and a left, which are intimately connected and work together. The right forces the blood through the pulmonary arteries into the lungs, whence, by means of the four pulmonary veins, it is brought back to the left side of the heart, and from here pumped out through the arteries to all por- tions of the body. The heart is a hollow muscle, conical in form, and so placed in the front and middle of the chest that the apex of the cone is directed downward, forward, and to the left. The throbbing of this apex is usually to be felt between the fifth and sixth ribs toward the left side. The upper border or base of the heart lies behind the sternum or breast bone, on a level with the sec- ond rib, and is covered by the lungs. The heart in the adult is about five fig. 25.— The heakt and large blood- inches long, and at its largest part . . , . ,^^^-!f ^% . , ^^ • u* , or A, right ventricle ; B, left ventricle ; C, nght three and a half inches broad and auricle; D, left auricle; E, aorta; F.pul- , 1 1 T c • 1 • 1-1 monarv arterv ; G, superior vena cava ; two and a halt mches m thickness. h, left pulmonary veins. 26 THE ANATOMY OF THE HUMAN BODY. Valves. Tlie average weight in the male adult is from ten to twelve ounces, and in the female about two ounces lighter. The heart is divided by a parti- tion running lengthwise into two halves, a right and a left. It is again divided bv another partition running crosswise, so that each side has two compartments — the" auricle, situated near the base, and the ventricle, which is situated toward the apex. Between the auricle and the ventricle of the same side there is a large opening called the auriculo-ventricular, which is furnished with valves that allow the blood to pass from the auricle to the ventricle, but prevent this blood from returning again into the auricle when the ventricle contracts. These valves are made of strong but thin membrane, and look like inverted wall pockets arranged around a circular opening, so that when the blood is flowing from the auricle to the ventricle they are emp- ty and flattened against the walls of the heart. As soon as the ventricle contracts and the blood contained in it tends to flow back through the opening, these pockets become filled with blood and distended, and, meeting in the middle of the opening, entirely block it up, thus pre- venting all regurgita- tion from the ventricle into the auricle. In or- der to prevent the valve from being forced bod- ily through tlie open- ing, the pockets have fastened to their free, unattached edges bands of strong fibres which, like guy ropes, hold them from going too far. These bands of fibres are the chordae tendinese, tendinous cords or " heart strings " of the heart. Besides the auriculo-ventricular openings which lead from one cham- ber of the heart to another, the heart has other openings. Into the right auricle there are the openings of the two greatest veins of the body : from above, the superior vena cava, through which flows the venous blood from the head, upper extremities, and upper portion of the body ; and from below, the inferior vena cava, which conveys the venous blood Fig. 26. — IIeaut and bibs. a,b,c,d,e, ribs; 1,2,3,4,5, intercostal spaces; nipple (fourth rib). position of Work performed by the heart. 27 from the lower part of the body and lower extremities to the right auricle. Opening out of the right ventricle there is the pulmonary artery, which conveys the blood from the heart to the lungs. Into the left auricle there open the pulmonary veins, of which there are four — two for the right and two for the left lung. Out of the left ventricle opens the aorta, by which blood is conveyed into the general circulation. The openings from the ventricles into the pulmonary artery and into the aorta are guarded by valves which are in each case three-leaved, but are not supplied with chordae tendineae. These valves are named, respectively, the pulmonary valve and the aortic valve. The openings of the veins into the auricles are not provided with valves, and yet no regurgitation of blood occurs, for the contractions of the auricles are weak, the force with which the blood enters the auricles being the chief factor which carries it through the auricles into the ventricles, the auricles themselves playing little more than a passive part. To review, then, the course of the blood before going further, we shall start with the contraction of the right auricle. The contraction of the right auricle, with the force with which the blood comes Circulation through j. ,, . • i t -, ^ ^ -, ■, the Heart from the great vems, carries the blood through the au- riculo-ventricular opening into the right ventricle ; the right ventricle immediately contracts, the blood is prevented from pass- ing back into the right auricle by the tricuspid valve, and is forced out of the ventricle into the pulmonary artery. Regurgitation here is pre- vented by the pulmonary valves, and the blood travels on into the lungs, flowing through the capillaries here into the pulmonary veins ; it is then carried into the left auricle, which then in its turn contracts, and the blood is conveyed into the left ventricle through the left auriculo-ventricular opening. Regurgitation into the auricle is prevented by the mitral valve, and when the left ventricle contracts, the blood is forced out into the aorta. The aortic valves situated here keep the blood. from flowing back into the ventricle, and so the blood is carried on into the general circulation, where, after passing through the arteries and capillaries, it is returned to the right auricle by the veins, the last and largest of which are the superior and inferior venae cavae. Thus is the entire circuit completed. It will be readily seen that the amount of work the different portions of the heart are called upon to perform is by no means equal for all of the parts. Thus the auricles have simply to pass the blood on into the ventricle, which is thus caused to dilate, and hence we find that there is very little muscular tissue in the walls of the auricles, as little muscular strength is required. The right ventricle must force the blood through the pulmonary arteries into and through the small capillaries of the lung, then back to the heart through the pulmonary veins. To accomplish this circulation, commonly referred to as the " lesser circulation " of the blood, 28 THE ANATOMY OF THE HUMAN BODY. requires considerable force, and we find the walls of the right ventricle correspondingly well supplied with a thick layer of unstriped muscular fibres. But it is upon the left ventricle that the great- est amount of work is thrown, for this portion of the heart must force the blood to the most remote parts of the body, into and through the various organs, such as the liver, the kid- neys, etc., and back again to tlie heart by means of the veins. Consequently, when we examine the heart, we find the walls of the left ventricle very much the most muscular of any, in order that it may properly perform its func- tion of maintaining the current of blood in what is M\ 4, ZK JVC---^- Fig. 27. — A schematic diagram of the heart, showing in ONE VIEW THE MECHANICAL ARRANGEMENT OF THE CAVI- TIES AND VALVES. (Designed and driiwn by Dr. 11. Macdonald.) SVC, tlie superior vena cava; /F<7, the inferior vena cava; RA, the ritrlit auricle ; 7'F, the tricuspid valve ; Ji \\ the right ventricle; /M, the pulmonary artery; P, the pul- monary valve; Po^Xha pulmonary veins; LA^ the left auricle; J/ F, tlie mitral valve; ZF, the left ventricle ; a, the aortic valve; Aa, the aortic arch. called the "greater circu- lation." To facilitate the move- ments of the heart, it is surrounded by a sac com- posed of membrane similar to the synovial membrane which lines the joints, and which secretes a lubricating fluid. This sac is called the pericardium. The interior of the heart is also lined through- out with a delicate and very smooth membrane which is called the endo- cardium. The arteries are tubes which convey the blood from the ventricles to every part of the body. They are composed of three layers or " coats " — an inner, an outer, and a middle. The inner coat is similar in appearance and structure to the smooth mem- brane lining the interior of the heart. The middle coat is composed partly of involuntary muscular fibres and partly of a kind of elastic tissue, so as to enable the artery to assist to a considerable extent in propelling the blood onward. The outer coat is formed of strong, firm tissue, which is also elastic. This coat gives to the arteries their great strength and the ability they possess to remain open when empty of blood. It is through Arteries. ARTERIES IN LIFE AND IN DEATH. 2y the action of tlie iniddle coat that most of the Ijlood i,s forced out of tlie arteries into the capillaries and veins at tlie moment of deatli. In the dead subject the arteries are found open, but contain little blood, a fact which gave rise to the belief among the ancients that the arteries always contained air, and Cicero taught that they conveyed the " breath " from the lungs to the va- rious portions of the body. Galen, in the second century, first pointed out the error, and showed that dur- ing life the arteries contain blood. The largest artery in the body is the aorta. This great tube, which arises from the left ventricle, is the main trunk which carries the blood to all parts of the body. At first it passes upward and forward toward the right side of the body, then arches backward and to the left, and comes to lie upon the left side of the spi- nal column. It passes down along the left side of the bodies of the dorsal vertebrge, and, perforating the diaphragm, enters the abdominal cavity and reaches the fourth lum- bar vertebra, where it divides into the right and left common iliac arteries. While arch- ing over to reach the left side of the spine it soon divides into two. Fig. 28. — The abdominal aorta. (After Henle.) AI. the common iliac artery ; /, the external iliac ; H. the internal iliac ; 8M, the middle sacral ; PHR, the inferior phrenic arte- ries ; Z/), one of the lumbar arteries ; C, the eoeliac; J/Z"^?, the superior mesenteric ; MEI, the inferior mesenteric ; 8E, tlie capsular ; i?, the renal ; SPI-, the spermatic ; HI, the internal hasmorrhoidal. sends out three very large branches, one of which making in all four large arteries, the two nearer 30 THE ANATOMY OF THE HUMAN BODY. the niiddlc are the two coiinnon carotid arteries, a riolit ami a left ; these pass upward to supply the liead and neck with many branches. The remaining two given off by the aorta as it arches backward and to the left are tlie sub- clavian arteries, a right and a left. The right subclavian lies to the right of the right com- mon carotid, and the left subclavian lies to the left of the left common carotid artery. The subclavian arteries pass upward at first, then outward, down into the upper extremi- ties to supply them with branches. The com- mon carotid arteries pass upward obliquely through the neck, and a line drawn from the articulation of the clav- icle or collar bone with the sternum or breast bone to a point just in front of the ear will nearly represent their course upon each side. At a point about on a Fig. 29. — Tiiii kxteknal carotid artery and its branches. (After Henle.) C<7, the common carotid ; CE, tlie external carotid ; C7, the inter- nal carotid; TSU, the superior thyroid; Zi', the superior laryngeal and tiie crico-tliyroid ; //}', the hyoid branch of the lingual; -.S', the sublingual; ME^ the facial; SMJ\ the sub- mental j Zi>/, the inferior labial; ZZ) 6', the coronary of the upper lip; SJSf^ the a. of the septum narium ; yl, the angular; CC', the occipital; AP^ the posterior auricular; TPS^ the superticial temporal ; 1, the tongue ; 2, the genio-glossus mus- cle ; 3, the hyo-glossus ; 4, the angle of the lower jaw : 5, the hyoid bone ; 6, the thyro-hyoid ligament; 7, the tliyroid car- tilage ; 8, the crico-thyroid membrane. level with the " Adam's apple " each common carotid divides into two arteries, an internal and an external carotid. The branches of one, the external carotid, supply mostly the outer portions of the head and face, while the branches of the other, the internal carotid, are distributed throughout the brain. The subclavian artery of each side at first arches upward behind the clavicle and then passes down and out between the clavicle and first rib. At this point the artery receives the name of axillary, and passes down below the shoulder joint through the axilla or armpit into the arm. When it reaches the arm this same arterial trunk is known as the brachial artery. The brachial artery passes down the arm, lying to the inner side of the biceps muscle, BRANCHES OF THE AORTA. 81 and, running across the front of the elbow joint nearly in the middle line, divides into the radial and ulnar arteries. It is the radial artery as it passes along the outer side of the wrist that is usually felt in counting the " pulse." The ulnar, though smaller and lying somewhat more deeply, can frequently be felt throbbing upon the inner side of the wrist. The long arterial trunk — known, according to its location, as the subclavian, the axillary, and the brachial artery — gives off numerous branches in its course, which are distributed to the neck, shoulder, and arm, while branches from the radial and ulnar arteries supply the forearm and hand with blood. The aorta, as it passes on downward through the abdomen, gives off many branches to various organs of the body, such as the liver, the stom- ach and the intestines, the kidneys, the spleen, etc. When it reaches the fourth lumbar vertebra, as mentioned above, it divides into two very large branches — viz., the right and the left common iliac arteries. These com- mon iliacs are short branches, being only about two inches long. Then they in turn divide, ..,^'^ each into two large branches — an internal iliac, which supplies with blood the organs contained in the pelvis, together with the external geni- tals, and an external iliac, which passes down- ward, outward, and forward, leaving the ab- dominal cavity to supply the lower extremity. It passes into the thigh from the cav- ity of the abdomen at about the mid- ^^y/ point of the " groin," where it re- ceives the name of femoral artery. This femoral artery passes down along the inner side of the thigh, and a line drawn from the middle of the groin to the inner side of the knee roughly indicates the position of the ves- sel. A little above the knee this same trunk passes behind the joint and becomes known as the popliteal artery. The popliteal artery divides just below the knee into two branches — an anterior and a posterior tibial artery. The anterior tibial supplies branches to the front of the leg and the upper surface of Fig. 30. — The subclavian- aeteet. (After Henle.) AB, the innominate ; CC, the common carotid ; SA, the sub- clavian ; P^, the vertebral; £A^ the basilar; M2fl. the in- ternal mammary ; FS. the superior epigastric ; J/"/*, the musculophrenic; IS, the superior intercostal; CT~P. the deep cervical; TY, the inferior thyroid; (7 Hdl. the ascend- ing cervical ; CTiS', the superficial cervical; JS, the supra- scapular ; TC, the posterior scapular. 32 THE ANATOMY OP THE HUMAN BODY. tlie foot, while the posterior tibial furnishes branches to the back of the leg and to the sole of the foot. The veins, as already stated, return the blood to the heart from all portions of the bLidv. Tliey, like the arteries, are composed of three coats, but the mid- reins. ,, , /• • • die coat of a vein is com- paratively weak, and, owing to this fact, a vein, when empty, will collapse. The veins differ in another important particular from the arteries in that they are provided with valves. These valves are most nnmerous in the veins of the extremities, and they are iisuallv composed of two leaves, sometimes of only one, and sometimes of three leaves. The valves are scattered along the course of the veins and prevent the blood from flow- ing in any way but one — namely, toward the heart. They are so arranged that they be- come tilled and block up the calibre of the vein when the l)lood attempts to flow iu the opposite direction — viz., away from the heart. Their position can be seen in the forearm if a moderately tight bandage is so placed around the arm as to retard the venous re- turn but not compress the arteries, and the hand opened and closed a few times to in- crease the supply of blood to the forearm. Such a procedure will result in a distention of the veins with blood ; they will stand out prominently, and at the same time the loca- tion of the valves will be seen readily. The four pulmonary veins which convey the Fio. \^ . MDU EDN COR- / DC 31. — The braciiiai, akteuy and its branches. (After Ilcnle.) H, tlie brachial; H, the radial ; /7, the ulnar; CLS, tlie ar- teria deltoidea ; 6'Z/, the profunda radial ; PB, the su- perior profunda; C.\f, the arteria collateralia media: C'UI, the anastomotic a. of the arm ; liJi, the anterior radial recun-ent; /i?C, the anterior ulnar recurrent; i^n/a wi/s ICO, the common interosseous; /A, the anterior inter- osseous: /P, the posterior interosseous; Hi, the posterior interosseous recurrent; /A V, the arteria interossea anterior volaris ; lA D, the arteria interossea anterior dorsalis ; J/, the median ,• O^B, the anterior radio-carpal; C'l'U', the anterior ulno-carpal ; C'DJi, the posterior radio- carpal; ifZ*^-^, the posterior ulno-carpal ; ifF.S, the superticial volar ; J/r/-", the ulnar [jortion of tne deep palmar arch ; DC, the tiiot palmar dij^ital. DEEP AND SUPERFICIAL VEINS. blood from tlie lungs to the left auricle, thus forming the return-channels of the " lesser circulation," are pe- culiar in two respects : they have no valves, and they contain " arterial " blood. The veins of the " great- er circulation " may be de- scribed as of two varieties, according to their situation, the deep and the superficial veins. The deep veins are placed deeply in the tissues and follow the course of the arteries ; and the superficial veins, which are situated nearer the surface of the body, lie mostly just be- neath the skin, where they can be seen readily, espe- cially when made to stand out by the method spoken of above. In the neck, be- sides many smaller veins, we have upon each side one very large one called the internal jugular vein. This vein at first accompanies the internal carotid artery ; lower down it follows the course of the common carot- id to the root of the neck, where the internal jugular of each side is joined by the large subclavian vein which comes from the upper ex- tremity. This junction of these two large veins forms the innominate vein upon each side, there being a right and a left. These two in- nominate veins join each 5 Fig. S2.— The femoral aktery. (After Henle.) CFI, the common femoral : ESF, the superficial epigai?- tric ; CIS, the superficial circumflex iliac : FC'E, the external pudic; PEF, the deep femoral : CFL, the ex- ternal circumflex of the thigh ; CFJF, the internal cir- cumflex of the thigh ; PF^, the first perforating a. of the thigh ; P/"^, the second perforating a. : PF^, the third perforating a.; AGS, the arteria anastomotic^ magna ; SF, the superficial femoral. 34 THE ANATOMY OF THE HUMAN BODY. other at an angle upon the left side of the median line of the body, and thus is formed the superior vena cava which empties into the right auri- cle, as already mentioned. The subclavian vein, which helps to form the innominate vein, is itself formed by the veins which come from the upper ex- tremity, which are of the deep and the superficial variety. The deep veins of the upper extremity accom- pany the arteries as in other parts of the body. The superficial veins are just beneath the skin in the greater part of their course, and are as follows : Ulnar and radial veins, upon the inner and outer sides of the forearm re- spectively, and, in the me- dian line of the forearm, the median vein. At the bend of the elbow these veins join together so as to form two large veins — the basilic upon the inner side, and the cephalic, upon the outer side of the arm. The basilic vein joins with the deep veins of the arm and forms the axillary vein, which then receives the cephalic. Higher up the axillary becomes the subclavian vein, which soon joins the internal jugular to form the innominate vein, as already mentioned. The veins of the lower extremity are divided into superficial and deep, as in the upper extremity, the deep veins accompanying the arteries and taking the same names. In the leg we have the anterior „ . .. and posterior tibial veins, which join and form the pop- liteal vein, which lies behind the knee joint. Higher up in the thigh this vein is called the femoral until after it has passed through the groin into the belly cavity, where it receives the name of ex- ternal iliac vein. As the vein passes through the groin it lies upon the inner side of the femoral artery. The superficial veins of the lower ex- tremity are two in number : one, beginning by small branches upon the outer side of the foot, runs up the back of the leg, and behind the knee joint joins the deep vein, which is here the popliteal ; the other superficial Fio. 33. 1, 1, the external juirular veins ; 2, the rifiht anterior jusjular vein; 3, 3, the internal ju;ature. Tiii.s increased flow of blood through the small branches soon resnlts in their becoming larger, and one or more of them will become so large that as much blood will reach the limb below the obstruction as before, and thus the nutrition of the part is maintained. Such a course of events is known as the establishment of the " collateral circulation." The most important exception to the frequent communication of the small arteries is found in the brain, where the small or " terminal " arteries do not anastomose, and hence, M'hen one or more of them become blocked or plugged, that portion of the brain supplied by the artery will be deprived of blood and will become softened and degenerated. SECTION Y. THE LYMPHATICS. Besides the vessels which act as channels for the circulating blood, and which have been described in the previous chapter, there are present in nearly every portion of the body other vessels, called the lymphatics, on account of the resemblance of the fluid contained in them to water (Latin, lympha). These vessels are also called the " absorbents," from their func- tion of absorbing materials from all parts of the body containing them, which material they convey finally into the circulating blood, as will pres- ently be seen. The lymphatic vessels of the small intestine are known as the lacteal or chyliferous vessels, because during the di- gestion of the food they become filled with a milk-white fluid called the chyle, which has been absorbed from the intestine and represents the products of the digestive process. The lymphatics are very delicate vessels with transparent walls, so that their contents may be easily seen through them. The larger vessels have, like the arteries and reins, three coats — all very thin ; but the smaller lymphatics have only one coat, the internal, as in the capillaries. There is, however, not so much varia- tion in size among the lymphatic vessels as is seen in the arteries and veins. These lymphatic vessels form nets or meshwork all over the body, and, like the veins, they are supplied with valves, but much more abundantly, so that they have the appearance of knotted threads. They are not arranged as a tree with branches, but have a resemblance more to 38 THE ANATOMY OF THE HUMAN BODY. a coinjilic'iiteil tano-le i)f throiuls (Fig. 30). Tliey are arranged in two sets, supertieial and deep ; but these two sets have very frequent communica- tion with each oiher. Besides the lymphatics and the lacteal vessels there exist numerous lymphatic glands; situated in various parts of the body, and with which are connected the lymphatics and lacteals in their im- * mediate neighbourhood. Some of the lymphatics open iiito the glands and convey the lymph from the surrounding tissues to the interior of the gland structure, while other vessels open out of tlie gland, and carry the lymph from the gland. These vessels communicate with others which in turn empty into some other neighbouring gland. The glands vary in size from a pin's head to an ahiiond. Some belonging to the superficial set are situated in the head around the ear, under the jaw, and in the neck, while other superficial glands are found in the upper extremity, in the armpit or axilla, and a single one upon the inner side of the arm just above the elbow, while in the lower extremity they occur mostly in the groin ; but there is usually one or more behind the knee joint in the popliteal space. The lymph and chyle of the body are finally collected by two main ves^ sels, one of which is small, being the common lymph channel for the right side of the head and neck, the right upper extremity, the right side of the thorax and what it contains — viz., the right lung and right side of the heart — and also for the upper surface of the liver. This common channel is called the right lymphatic duct. The left lymphatic duct is much longer and larger than the right, and, from its course, is known as the thoracic duct. This thoracic duct conveys the lymph and chyle from all ])ortions of the body which are not enumerated above as supplying the right duct. The thoracic duct is about sixteen inches long, and, beginning in the loin Fio. 36. — Lacteals and lymphatics ouk IXO DIGESTION. (DaltOll.) LYMPHATICS AND NERVOUS SYSTEM. 39 or lumbar reo;iori of the abdomen, it extends upward along the bodies of the vertebnB, passes through the same opening in the diaj)hragm through which the aorta goes, and enters the cavity Lymphatic Duds. n .^ ,^ -r, .^ .^^ •, 1 01 the thorax. It then passes on up until it reaches the seventh cervical vertebra, when it arches forward to its termina- tion. At its commencement upon the second lumbar vertebra, where it receives many large branches, the thoracic duct is dilated into a sac of considerable size, but farther up the duct is about the size of a goose quill. The right lymphatic duct and the thoracic duct empty respectively into the right and into the left subclavian veins, near their junction with the internal jugular veins, upon each side of the root of the neck. During and following the digestion of food the thoracic or left lymphatic duct is gorged with the chyle which has been collected from the intestine, and which it receives and conveys into the general circulation by pouring it into the left subclavian vein. The openings of the right duct into the right subclavian vein and of the thoracic duet into the left subclavian are protected by valves which prevent the blood from flowing into the ducts, but allow the lymph and chyle to pass from the ducts into the veins. Both of the ducts are well supplied with valves throughout their course. The lymphatic vessels lying beneath the skin can sometimes be seen as red lines running from the neighbourhood of poisoned wounds toward the nearest lymphatic gland or bunch of glands. SECTION yi. THE NERVOUS SYSTEM. The nervous system of the body is composed of two distinct kinds of elements which are closely associated together in their functions and in their anatomy. One, the nerve-cell, is for the production of impulses and for the receipt of impressions ; and the other, the nerve-fibre, is for the transmission of these impulses and impressions to and from various localities. The first of these elementary varieties, then, is the nerve-cell or nerve-corpuscle. ISTerve-cells are composed of finely granular matter, and are of a red- dish or yellowish-brown colour. They vary much in size and shape, some being small and others large ; some are rounded, some angular, and still others stellate in shape (Fig. 37). The last, stellate-cells, are especially characterized by having one of their processes much prolonged. This process is the beginning of a nerve- fibre. All of the nerve-cells have one or more prolongations or processes which are very delicate ; some of these processes apparently serve to 40 THE ANATOMY OF THE HUMAN BODY. connect the cell with neighbouring or distant cells, while others become continuous with, and seem to give origin to, a nerve-libre. AVhere the nerve cells or corpus- {^ / cles are collected to- gether in masses, we have what is known as the " gray matter " of the nervous system, as distinguished from the " white matter," which is composed chietly of the nerve-fibres. This gray matter, represent- ing an aggregation of nerve-cells, is found upon the outer surface or cortex of the brain and cerebellum, in smaller masses in the interior of these or- gans, and in the inte- rior of the spinal cord. It not only exists in these comparatively large masses, l^ut is also found in smaller accumulations in vai-ious parts of the body, as will be seen later. These aggregations of cells, forming larger and smaller masses of gray matter, are the nerve-centres of the body. The nerve-fibres constitute what is known as the white matter of the nervous system and make up the nerve-cords of the body, and form the greater bulk of the brain where they are in the interior, and also of the spinal cord where they occupy the ex- terior. There are two kinds of nerve-fibre. One is called the medullated, and this is the variety which is found almost everywhere throughout what is known as the cerebro-spinal nervous system — viz., tliat system which consists of the brain and spinal cord and their branches, and which controls the animal functions of the body, such as sensation and motion, and the special senses. The other variety of nerve-fibre is called the non-medullated, and goes to form almost entirely the nerve-cords of the sympathetic nervous system, which system has control over the vegetative functions of the body, such as circulation and digestion, in contradistinction to those functions which are the special attributes of animals. Fig. 37. — Multipolar ganglion cells kkom the hitman ekain. 1, a cell, one of whose processes (a) becomes the axis cylinder of a iierve-fibre (b) ; 2, a cell (o) connected with another (h) by means of a commissure (c) ; 3, diatrram of three cells («) con- nected by means of commissures (h), and runnint; into fibres (c) ; 4, a'multipolar cell containinjr black pigment. Nerve-fibres. MEDULLATED AND NON-MEDULLATED NERVE-FIBRES. 41 The nerve-fibres of tlic cercbro-spinal system are, as has been said, of the mednllated variety. Such a iiorvc-fil^ro consists of (1) a central por- tion, transparent, of the coTi.sLstcncu of the boiled white of an (i^