32 



INDEX. 



Nerve, facial, 834 



fibres, physical properties of, 775 



structure of, 30 

 Lypoglossal, 835 

 oculo-motor, 832 

 olfactory, 832' 

 optic, 832 

 pathetic, 832 

 pneumogastric, 834 

 gpinal accessory, 835 

 stimuli, 776 



tissue, development of, 34 

 trifacial, 833 

 trigeminal, 833 

 trunk, structure of, 772 

 Nerves, acceleratory, 551 

 afferent, 772 

 centrifugal, 772 

 centripetal, 772 

 degeneration of, 778 

 efferent, 772 



electrical phenomena in, 779 

 functional, distinctions between, 772 

 influence of constant current on, 777, 



780 



inhibitory, 549 

 intercostal, 599 

 laryngeal, influence of, in respiration, 



601 



of taste, 896 

 phrenic, 599 



pneumogastric, influence of in respira- 

 tion, 600 



vaso-constrictor, 558 

 vaso-dilator, 558 

 vaso-motor, 554 

 Nervous influence on protoplasmic motion, 



76 



irritability, 776 



system, conduction of motor and sen- 

 sory impulses through, 827 

 influence of, on arteries, 552 

 on bodily temperature, 697 

 on circulation, 540 

 on micturition, 649 

 on renal secretion, 645 

 on respiration, 598 

 secretion of milk, 629 

 of articnlata, 767 

 of birds, 770 . 

 of fishes, 770 

 of mollusks, 767 

 of reptiles, 770 

 of star-fish, 766 

 of the heart, 540 

 ^of vertebrates, 769 

 'organs of, 36 

 physiology of, '765 

 scheme of, 766 

 structure of, 770' 

 sympathetic, 835 



tissues, chemical and physical charac- 

 teristics of, 774 



Neurokeratin, 775 

 Nicotine, action of, on heart, 546 

 Nitrogen, excretion of, 672 

 Nitrogenous matter, metabolism of, 673 



organic cell-constituents, 88 



tissue, constituents of, 85 

 Nceud vital, 600 



Non-nitrogenous organic cell -constituents, 

 112 



tissue, constituents of, 85 

 Nostrils, movements of, in respiration, 579 

 Nuclein, 482 

 Nucleolus of cells, 13 

 Nucleus, deviation in form of, 27 



division of, 17 



of cells, 13 



of Pander, 21 

 Nutrition, 659 



of nerves, influence of spinal cord on, 

 778 : 



of protoplasm, 14 



statistics of, 672 

 Nutritive functions, 155 



processes in feeding, 680 



proportion in foods, 684 



proportions, 195 



salts, 192 



substances, 159 



Oats, composition of, 167; 

 CSsophageal canal, 320 



functions of, 376 

 Ocelli, 847 

 Ocular apparatus in mammals, 849 



muscles, 875 

 Oculo-motor nerve, 832, 875 



action of, on pupil, 862 

 Odorous substances, properties of, 844 

 'Oleic acid, 122 

 Olein, 122 

 Olfactory cells, 842 



lobes, 807, 841 



nerve, 832, 841 



distribution of, 842 

 Olivary bodies, 811 

 Omasum, structure of, 319 

 Omnivora*, characteristics of, 198 



digestive power of, 436 



gastric digestion in, 363 

 Optical characteristics of tissues, 68 

 Optic lobes, 807 



nerve, 832 



nerve-fibres, 867 



thalamus, functions of, 823 

 Organic acids, construction of, 85 



nitrogenous cell-constituents, 88 

 Organisms, elementary, 11 

 Organized and unorganized bodies, distinc- 

 tions between, 2 



bodies, structure of, 11 



body, definition of, 2 

 Organs and tissues, development of, 31 , 



classification of, 36 ; 



