590 INDEX 



Nerves, vaso-motor, 65, 67, 204, 494 



vestibular, 392, 523 

 Nerve-cells of cord, 467 



breadth of, 566 

 in olfactory " nerve," 516 

 in grey matter, 456, 458 

 in nerve centres, 456 

 of sympathetic ganglia, 498 

 Nerve centre, spinal cord an independent, 486 

 Nerve centres, composition of, 450 

 function of, 21. 486 

 Nerve-Hbres, in blind spot of eve, 430 

 diameter of, 460, 566 

 in ear, 383 

 meduUated, 469 

 nodes of, 460 

 nucleated, 460 

 structure of, 453, 459 

 in tactile corpuscles, 349 



white matter of cord and brain composed of, 458 

 Nerve roots, functions of, 472 

 Nervous apparatus, duplexity of, 452 



impulse, rate of transmission of, 478 



molecular change in nerve-fibres caused by, 383, 



341, 426 

 transmitted from brain by spinal cord, 486 

 system, 452 



as co-ordinating organ, 26 

 as controlling circulation, 33, 34, 66 

 evaporation, 203 

 glaiulnlar action, 193 

 muscular action, 472 

 respiration, 156 et seg. 

 Neuraxon, 461 

 Neurilemma (vevpof, a nerve ; Ae>/j.a, a peel or skin), 460, 467 



continuous with sarcolemma, 463 

 Neuroglia, the, 465 



Nitrogen (I'tVpor, potash ; yti-couj, I produce) not absorbed by lungs, 

 1.50, 152, 269 

 daily waste of, 270 et seq. 

 in proteid foods, 108. 188, 225 

 starvation from lack of, 274, 277 

 in urea, 184 

 in blood, 125 

 Nitrogenous foods, 225 

 Nodes of nerve-fibres, 460 

 Noises, 384 



Non-meduUated nerve-fibres, 497 

 Non-nitrogenous foods, 225, 226 

 Non-vascular tissues, 31 

 Nose, 130, 362 



Nuclear layer, of cerebellum, 511 

 Nuclear layers of retina, 418 

 Nucleated cells, in capillaries, 31 

 in cartilage, 548 



of epidermis and epithelium, 542, 545 

 in lacunae of bone, 313 

 all tissues primitively composed of, 295, 537 



