644 



INDEX. 



Nerves of sensation, laws of action 



in, 379 



of special sense, 424 

 secretory, 325, 377 

 spinal, 390. See Spinal Nerves, 

 stimuli of, 377 

 structure of, 269 

 sympathetic. See Sympathetic 



Nerve. 



trophic, 310, 377 

 ulnar, effect of compression of, 380 



of division of, 382 

 vaso-inhibitory. 453 

 vaso-motor, 121, 452 

 Nervi-nervorum, 381 

 Nervous force, velocity of, 386 



layer of retina, 504 

 Nervous substance, chancres in from 



mental exertion, 377 

 fibrous, 369 



phosphorus in urine from, 365 

 vesicular, 368, 375 

 Nervous system, 367 



eerebro-spinal, 367. 386 

 development of, 582, 603 

 elementary structure of. 368. See, 

 Nerve-corpuscles and Nerve- 

 fibres. 



influence of on animal heat, 198 

 on arteries, 122 

 on contractility, 461 

 on contraction of bloodves- 

 sels, 122, 453 

 on erection, 153 

 on gastric digestion, 234 

 on the heart's action, 112 

 on movements of intestines, 



376 



of stomach, 236 

 on nutrition, 307 

 on respiration, 185 

 on secretion, 324 

 on sphincter ani, 376 

 of organic life, 368, 445 

 sympathetic, 368 

 Nervus abducens seu ocularis ex- 



ternus, 426 



patheticus seu trochlearis, 426 

 vagus, 438. See Pneumogastric. 

 Networks, capillary, 133. See Capil- 

 laries. 



Neuralgia, division of nerves for, 380 

 New-born animals, heat of, 190 

 Ninth cerebral nerve, 544 

 Nipple, an erectile organ, 153 



structure of, 614 

 Nitrogen in blood, 81 



influence of in decomposition, 20 

 in relation to food, 205 

 in respiration, 177 

 Nitrogenous food, 199, 202 



Nitrogenous food, in relation to mus- 

 cular work, 474 

 in relation to urea, 361 



to uric acid, 362 

 principles, 21 

 N*oise, how produced, 543 

 Noises in ears, 546 

 Nose. See Smell. 



irritation referred to, 384 

 restoration of, sensitive phenom- 

 ena in, 381 

 Non-azotized or non-nitrogenous food, 



200 



organic principles. 20 

 Non-vascular parts, nutrition of, 307 

 Nuclei, description of, 29 



in developing and growing parts, 



305 



Nucleoli or nucleus-corpuscles, 29 

 Nutrition compared with secretion, 



322 



conditions necessary to, 306 

 exiimples of, 300 

 general nature of, 299 

 influence of conditions of blood 



on, 306 

 of nervous system on, 308, 



431 



of state of part on, 310 

 of supply of blood on, 307 

 of sympathetic nerves on, 452 

 in paralyzed parts, 308 

 in vascular and non-vascular 



parts, 307 

 Nutritive, repetition, 305 



reproduction, 305 

 Nymphse, 563 



Oblique muscles of the eye, action of, 



427 

 Ocular cleft, 604 



spectrum, 517 

 Odors, causes of, 495 



different kinds of 498 

 perception of, 494 



varies in different classes, 498 

 relation to taste, 553 

 (Esophagus, action of in deglutition, 



214 



reflex movements of, 395 

 Oil, absorption of, 291, 298 

 Oily matter, 20 



coated with albumen, 314 

 Oleaginous principles, digestion of, 



230, 251, 265, 270 

 Olein, 20 

 Olfactory cells, 495 



lobes, functions of, 411 

 nerve. 495 



subjective sensations of, 498 



