D.

Death, 103

Diaphragm, 52, 97

Diet, 11, 95

Digestion, 11 by body, 22 by cell, 16

Doctor, ix

Drum of ear, 75

E.

Ear, 74

Education, 99

Efferent system of nerves, 92

Egg, white of, 13

Electric manifestations in tissues, 40 organs of fish, 42 stimulation of tissues, 37, 88

Embryo, development of, 17

Endolymph, 74

Enzyme, 15

Epilepsy, 89

Equilibrium, 66, 84

Exercise, 97

Eye, 73 education of, 100 protection of, 65

F.

Fainting, 66

Fat, 14, 24, 27

Fatigue, 40, 102

Ferments, 15

Fibres, connective tissue, 35 muscle, 34 nerve, 42, 60

Fibrils, muscle, 35

Fish, electric, 42

Food, 10, 95 amount of, 15, 96 vacuole, 16

Forehead, 91

Frog experiments on muscle, 37 reflexes, 68

G.

Ganglion, spinal, 62

Gastric juice, 23

Gelatin, 24, 35, 96

Gland cells, 21

Glands, origin of, 20 salivary, 22 sweat, 71 tear, 65

H.

Hæmoglobin, 29

Hair, 70

Harvey, 108

Head, 79

Hearing, 74

Heart, 48, 66

Heat, production of, 13 regulation of, 83

Histological methods, 110

Huxley, 7

Hydrochloric acid, 23

Internal secretion, 29

Intestine, movements of, 47

Involuntary movements, 65 muscle, 34

Iron, 95

K.

Kidneys, 29, 95