INDEX 



Nerve fibers, fatigue of, 575 

 functions of, 534 

 medulla ted, 66 

 non-medullated, 67 

 impulses, 533 

 cellulifugal, 577 

 cellulipetal, 577 

 character of, 533 

 rate of, 570 

 specific energy of, 576 

 transmission through neurone, 577 

 velocity of, 534 

 stimuli, 512, 533 

 terminations, 74 

 Nerves, cardiac, 214, 266 

 cranial functions of, 650 

 depressor, 248 



effect of currents on human, 535, 537 

 experiments on, 557 

 irritability of, 558 

 vasoconstrictor, 246, 254 

 vasodilator, 249, 251, 252 

 vasomotor, 243, 246, 249 

 Nervous system, 572 



axones of, 65, 577 

 dendrites of, 65, 577 

 functions of, 572 

 ganglia of, 578 



influence on secretion, 339, 446 

 laboratory experiments on, 675 

 neuroglia of, 65, 78 

 spinal hemisection,,677 

 sympathetic, 663 

 Neurilemma, 66 

 Neurofibrils, 72 



Neurogenic theory of heart beat, 201 

 Neuroglia, 65, 78 

 Neurone, 65, 572 



characteristics of, 575 



irritability, 675 



polarity in, 675 



theory-, 573 



transmission of nerve impulses 



through, 577 

 types of, 578 

 Neutrophiles, 116, 132 

 Ninth cranial nerve, 659 

 Nitrogen in proteins, 106 

 Nitrogenous equilibrium, 457 

 food, 341 

 output, 459 

 substances in body, 79 



Nitrous oxide, effect of breathing, 318 

 Nodes, cardiac, 204 



of Ranvier, 66 



Nostrils, respiratory movements of, 291 

 Nuclei of optic thalamus, 625 

 Nucleic acid, 92 

 Nucleoalbumins, 95 

 Nucleoli, 1 8 

 Nucleo proteins, 87, 92 

 Nucleus, 9, 1 8 



ambiguus, 657 



ruber, 624 

 Nutritional diseases, 480 



Obesity, 467 

 Ocular fixation, 751 

 Odontoblasts, 57 

 Oils, as food, 344 

 Olfactory apparatus, 694 



bulb, 696 



center, 646 



glomeruli, 646 



nerve and tract, 646 

 Olivary bodies, 608, 610 

 Olive, accessory, 610 



superior, 616 

 Onkograph, 438 

 Onkometer, 437 

 Ophthalmoscope, 742, 766 

 Opsonic index, 151 

 Opsonins, 151 

 Optic center, 645 



nerve, 719 



thalami, 625 

 Optical apparatus, 724 



defects in, 734 

 Organ of Corti, 705 

 Osmosis, 152 



Osmotic pressure, 85, 153 

 Osseous labyrinth, 703 

 Ossicles of ear, 701 

 Ossification, 46 



center of, 47 



in membrane, 46 

 Osteoblasts, 47 

 Osteoclasts, 49 

 Osteogenetic fibers, 47 

 Output of energy, 479 

 Ovaries, 772 



relation to metabolism, 499 

 Oviducts, 775 

 Ovulation, 777 



