Lymph spaces, 66. Lymph vessels, 66. Variable pressure on the walls of, 70. Magnesium, 135. Malarial fever, 401. Malleus, 359. Malpighian capsules, 203. Maltose, 120. Massage, 259. Mastication, Muscles of, 144. Slow, 145. Thorough, 160. To show importance of, 171. Matrix, 267. Measles, 94. Care after, 211. Median fissures, 289. Medulla oblongata, 291. Medullary sheath, 284. Membrana tympani, 358. Membrane, Active, 173. Basement, 197. Basilar, 363. Membranous capsule, 377. Membranous labyrinth, 361. Mesentery, 152. Metacarpals, 227. Midbrain, 289. Middle ear, 359. Purposes of, 360. Milk sugar, 120. Mineral salts, 30. Uses, 121. Moderate drinkers, 333. Molars, 143. Molecules, defined, 105. Mon-axonic neuron, diagram of, 282. Mono-saccharides, 120. Mosquitoes, 401-403. Remedies against, 402. Mouth, 141. Movable joints, Kinds of, 231. Structure of, 230. Mucous membrane, 80, 264. Mucus, 139. Muscle organ, 245. Muscles, 243-263. Alimentary, 189. Important, 254-256. Intercostal, 87. Of mastication, 144. Properties of, 243. Muscular force, plan of using, 249. Muscular sensations, 344. Muscular stimulus, 248. Muscular stimulus and contraction, to illustrate, 261. Muscular tissue, kinds of, 243, 244. Nails, 267. Care of, 276. Nasal duct, 383. Neck exercise, 328. Nerve cells, 281, 282. Nerve fibers, 282, 293, 294. Nerve path, diagram of, 286. Nerve pathways, to demonstrate, 322. Nerves, 281. Nerve skeleton, 280. Diagram of, 281. Nerve stimuli, 306. Nerve trunks, 281. Nervous activity, wasteful forms of, 325. Nervous control of, Body temperature, 320. Circulation of blood, 318. Respiration, 320. Nervous energy, economizing of, 315. Nervous impulse, 248, 305. Nervousness, 326. Nervous system, 279-337. Diagram of, 287. Dissection of, 302. Divisions of, 287. Hygiene of, 324-337. Nature of, 287. Physiology of, 304-323. Work of, 280. Neural arch, 224. Neurilemma, 284. Neurons, 281, 282. Arrangement of, 284, 293. Diagram, illustrating, 285. Properties of, 304. Nicotine, Effects of, 333. Relation of age to effects, 333. Nitrogen, 134. Non-striated cells, to show, 261. Non-striated muscles, Purpose of, 246. Structure of, 246. Work of, 247. Normal temperature, 269. Nosebleed, 58. Nucleoplasm, 14. Nutrients (_see_ Foods), Composition of, 135. Relative quantity needed, 123. Routes taken by, 175. Tests for, 136. Nutriment, storage of, 177-180. Olfactory stimulus, 347. Opsonins, 34. Optic thalami, 289. Orbit, 373. Organ, defined, 7. Organism, defined, 19. Organization, defined, 10. Osmosis, 72. At the cells, 72. To illustrate, 75. Ossein, 218. Overstudy, 211. Oxidation, defined, 106.