540 



INDEX 



Muscle sense, 172. 

 Muscle spindle, 83. 

 Muscle stroma, 84. 

 Muscular contraction, 90; extent of, 



93. 



Muscular elasticity, 97. 

 Muscular energy, source of, 99. 

 Muscular sense, 172. 

 Muscular tissue, 34, 80. 

 Muscular work, 95. 

 Muscularis mucosse, 409. 

 Myelin sheath, 118. 

 Myenteric reflex, 428. 

 Myogen, 84. 



Myogenic theory of heart-beat, 314. 

 Myopia, 226. 

 Myosin, 84. 

 Myxedema, 271. 



Nails, 478. 



Nasal bone, 56. 



Nasal duct, 210. 



Nerve, 116; abducens, 131; auditory, 

 131; depressor, 316; facial, 131; 

 glossopharyngeal, 131 ; hypoglos- 

 sal, 131; inferior maxillary, 130; 

 median, 298; oculomotor 129; ol- 

 factory, 129; ophthalmic, 129; 

 optic, 129, 215; patheticus, 129; 

 phrenic, 128; pneumogastric, 131; 

 sciatic, 129; spinal accessory, 131; 

 splanchnic, 338, 411; superior 

 maxillary, 130; trigeminal, 129; 

 vagus, 131. 



Nerve-cells, 117; sensory, cell-bodies 

 of, 137. 



Nerve-fibers, fatigue of, 135. 



Nerve impulse, definition, 116; how 

 aroused, 134; nature of, 135; 

 speed of, 136; spread of, in both 

 directions, 135; as stimulus to 

 muscle, 88; methods of studying, 

 134; variations in intensity, 135. 



Nerve paths, afferent, 142; efferent, 

 142; method of tracing, 143. 



Nerves, cardiac, 315; cranial, 119, 

 129; of respiration, 364; secretory, 

 435; spinal, 119, 126; sympathetic, 

 119, 165; trophic, 435; vasocon- 

 strictor, 337; vasodilator, 341 ; vaso- 

 motor, 336. 



Nervi erigentes, 508. 



Nervous system, anatomy of, 116; 

 central and peripheral, 118; mem- 

 branes of, 119; physiology of, 134; 

 sympathetic, 119, 165. 



Neurilemma, 118. 



Neurogenic theory of heart-beat, 314. 



Neuroglia, 119. 



Neurons, 116; association, 117; bi- 

 polar, 117; motor, 117; post- 

 ganglionic, 165;pre-ganglionic, 165; 

 sensory, 117. 



Nicotine, effect of, on nerves, 166. 



Nictitating membrane, 209. 



Nipple, 522. 



Nitrogen equilibrium, 458. 



Nitrogenous extractives, 12. 



Nodal points of eye, 231. 



Nodes of Ranvier, 118. 



Noise, 193. 



Nose, bones of, 56. 



Notes, musical, 193. 



Nuclear spindle, 21. 



Nuclei, nervous, 132. 



Nuclein, 29. 



Nucleolus, 18, 20. 



Nucleo protein, 11. 



Nucleus of cell, 18. 



Nucleus, caudate, 132; cuneate, 144; 

 dentate, 132, 162; gracile, 144; 

 lenticular, 132; red, 132. 



Nutrients, 387; function of, 389. 



Nutrition, see Metabolism. 



Nutrition of embryo, 520. 



Nutritive tissues, 32. 



Nutritive value, of albuminoids, 457; 

 of carbohydrates, fats and pro- 

 teins, 455. 



Obesity, treatment for, 460. 



Oblique muscles of eye, 211. 



Occipital bone, 56. 



Occipital lobe of cerebrum, 147. 



Oculomotor nerve, 129. 



Odontoid process, 54. 



Odors, nature of, 203. 



Old-sightedness, 230. 



Olecranon, 62. 



Olein, 14. 



Olfactory areas of cerebrum, 148. 



Olfactory lobes, 124. 



Olfactory nerves, 129. 



Olfactory organ, 202. 



Omentum, 405. 



Ophthalmic nerve, 129. 



Opsonins, 276. 



Optical defects, 226. 



Optic chiasma, 129, 215. 



Optic disk, 214. 



Optic nerve, 129, 215. 



Optic thalami, 124, 132. 



Optic tracts, 129, 215. 



Optogram, 237. 



Orbicularis oris, 102. 



Orbicularis palpebrarum, 103, 209. 



Organ of Corti, 192. 



Organs, 1, 35; of circulation, 288; of 



