INDEX. 



809 



Nerves, continued. 

 structure of, 465. 

 sympathetic. ticc Sympathetic 



Nerve. 



trophic, 388, 475. 

 ulnar, effect of compressionof, 479. 



of division of, 482. 

 vaso-inhibitory, 577. 

 vaso-motor, 142, 576. 

 Nervi-nervorum, 481. 

 Nervous force, velocity of, 488. 



layer of retina, 641. 

 Nervous substance, changes in from 



mental exertion, 376. 

 fibrous, 465. 



phosphorus in urine from, 461. 

 vesicular, 464, 473. 

 Nervous system, 463. 

 cerebro-spinal, 463, 488. 

 development of, 743, 770. 

 elementary structure of, 464. See 

 Nerve-corpuscles, and Nerve- 

 fibres. 



influence of, on animal heat, 243. 

 on arteries, 142. 

 on contractility, 587. 

 on contraction of blood-vessels, 



142, 577- 

 on erection, 184. 

 on gastric digestion, 291. 

 on the heart's action, 129. 

 on movements of intestines, 346. 



of stomach, 294. 

 on nutrition, 385. 

 on respiration, 226. 

 on secretion, 408. 

 on sphincter ani, 346. 

 of organic life, 464, 568. 

 sympathetic, 464. 

 Nervous abducens seu ocularis ex- 



ternus, 541. 



patheticus seu trochlearis, 541. 

 vagus, 557. See Pneumogastric. 

 Networks, capillary, 157. See Capil- 

 laries. 



Neuralgia, division of nerves for, 480. 

 New-born animals, heat of, 232. 

 Ninth cerebral nerve, 565. 

 Nipple, an erectile organ, 183. 



structure of, 784. 

 Nitrogen in blood, 89, 90. 



influence of in decomposition, 10. 

 in relation to food, 253. 

 in respiration, 216. 



Nitrogenous food, 245, 248. 



in relation to muscular work, 



603. 

 in relation to urea, 454. 



to uric acid, 456. 

 principles, n. 

 Noise, how produced, 692. 

 Noises in ears, 696. 

 Nose. See Smell. 



irritation referred to, 486. 

 restoration of, sensitive pheno- 

 mena in, 481. 

 Non-azotised or Non-nitrogenous 



food, 245. 



organic principles, 10. 

 Non-vascular parts, nutrition of, 



Nuclei, 



description of, 23. 



in developing and growing parts, 



382. 



Nucleoli or nucleus-corpuscles, 23. 

 Nutrition compared with secretion, 



405- 



conditions necessary to, 383. 

 examples of, 376. 

 general nature of, 374. 

 influence of conditions of blood 



on, 383. 



of nervous system on, 385, 548. 

 of state of part on, 389. 

 of supply of blood on, 384. 

 of sympathetic nerves on, 575. 

 in paralysed parts, 386. 

 in vascular and non-vascular 



parts, 385. 

 Nutritive, 



repetition, 382. 

 reproduction, ib. 

 Nymphie, 717. 



0. 



Oblique muscles of the eye, action 



of, 543- 



Ocular cleft, 773. 

 spectrum, 659. 

 Odours, 



causes of, 630. 

 different kinds of, 634. 

 perception of, 630. 



varies in different classes, 634. 

 relation to taste, 705. 



