INDEX 



893 



NERVES. 



Nerves continued 



degeneration, 164, 200 

 chemistry of, 177 

 reaction of, 188 



direction of a nerve impulse, 173 



efferent, 90, 161 



electrical, 162 

 stimulation of, 186 



excitability of, 172 



fibres, 91 

 development of, 96 



functions of, 164 



funiculi of, 94 



grey matter, 91 



inhibitory, 162 



intercentral, 163 



intracardiac, 252 



irritability of, 99 



laws of conduction, 162 et seq. 



medullary sheath, 92 



meduUated, 91 



motor, 161 

 termination of, 95 



nodes of Ranvier, 92 



non-medullated, 91 



olfactory, 628, 735 



physiology of, 161 et seq. 



plexuses of, 95 



reflex actions, 163, 198 



secretory, 162 



section of, 164, 477 



size of, 94 



spinal. See Spinal Nerves. 



splanchnic, stimulation of, 361 



stimulation of cut, 164, 361, 477 



structure, 91 



sympathetic, influence on heart, 249 



taste, 731 



terminations of, 

 in corpuscles of Golgi, 722 

 in corpuscles of Grandry, 722 

 in corpuscles of Herbst, 719 

 in end-bulbs, 720 

 in motorial end-plates, 95 

 in networks or plexuses, 723 

 in Pacinian corpuscles, 719 

 in touch-corpuscles, 720 



trophic, 162, 813 

 Nervous circles, 662, 674 

 Nervous system, 



cerebro-spinal, 191, 606 



development, 858 et seq. 



electrical variation in central, 697 



influence on the heart, 370 



sympathetic, 249 



vaso-motor, 297 et seq. 

 Nervous tissues, chemistry of, 175 

 Neural crest, 861 

 Neurenteric canal, 832 

 Neuroblasts, 859 

 Neuroglla, 191, 609, 859 

 Neurokeratin, 92, 192, 404 

 Neuro-muscular spindles, 86, 722, 723 

 Nicotine, action of, 302, 340, 478 

 Nissl's granules, 195 et seq., 700 



significance of, 200 

 Nitric oxide haemoglobin, 437 

 Nitrogen in the blood, 378 



eliminated in the form of urea, 459 

 Nodal point, 777 

 Nodes of Ranvier, 92 

 Nose. See Smell. 



development of, 867 

 Notochord, 835, 843 

 Nuclear layers, 772, 773 



sap or matrix, 10 



OSSICLES OF THE EAR. 



Nucleic acid, 402 



Nuclein, 11, 402, 403, 463 



Nuclei pontis, 635 



Xucleoli, 10 



Nucleo-proteids, 402 



Nucleus of animal cell, 6, 10 et seq. 



chemical composition, 11 



division, 16 



staining of, 11 



structure, ib. 



Nucleus ambiguus, 634, 645 

 Nucleus of Bechterew, 643 

 Nyctalopia, 803 

 Nystagmus, 803 



O. 



Oblique vein of Marshall, 853 

 Odontoblasts, 68, 70, 72, 73 

 Odontogen, 73 

 Odours, 737. See Smell. 

 (Esophagus, development, 867 



structure of, 446 

 Oleaginous principles, 308 

 Oleic acid, 394 

 Olein, 44, 393 

 Olfactory bulb, 735 



cells, 734 



depression, 847 



nerves, 628, 735 



tract, 735 



" roots" of, ib. 

 Olivary body, 626, 634 

 Oliver's haemacytometer, 425 



on the sphygmometer, 293 

 Omphalo-mesenteric veins, 839, 849, 52, 855 

 Oncograph, Roy's, 309 

 Oucometer, 310, 545 



intestinal, 533 



Roy's, 309, 333 

 Oocytes, 821, 825, 828, 829 

 Oogonia, 825 



Ophthalmoscope, 792 et seq. 

 Opsonins, 444 

 Optic disc, 771 

 Optic nerve, 628 



decussation of fibres in, 808 



development of, 865 

 Optic thalamus, 654 



vesicle, primary, 864 

 Optical angle, 779 



apparatus of eye, 777 



defects in, 784 

 Optogram, 802 



Ora serrata of retina, 771, 776 

 Orang's brain, 663 

 Orbito-sphenoids, 848 

 Organ of Corti, 744 



of Giraldes, 875 



Organic compounds in body, 386 

 Organised ferments, 406 

 Ornithine, 573 

 Osmosis, 322, 523 



distinguished from diffusion, 397 

 Osmotic pressure, method of estimating. 321 , 323- 

 327, 548 



calculation of, 325 



determination of, ib. 



of proteids, 326 



phenomena, 321 et seq. 



physiological applications, 326 

 Ossein, 403 



Osseous labyrinth, 741. See Ear. 

 Ossicles of the ear, 740 



action of, 747 



