INDEX. 



863 



PAGE 



Muscular tissue, tonicity of 471 



sensibility of 472 



contractility of 472 



changes in the form of, during contraction 475 



duration of contraction of, under artificial 

 excitation 476 



single contraction of 476 



tetanic contraction of 477 



sound produced by contraction of 477 



fatigue of 478 



electric phenomena in 479 



negative variation of 480 



Musical sounds (see Sound) 739 



Mustache, uses of . . 353 



Mustard 181 



Mutes (division of consonants) 503 



Myeline 507 



Myelocytes 520 



Myeloplaxes 484 



Myolemma 467 



Myopia 695 



Myosine 439, 470 



Myxoedema 422 



Naboth, ovules of 774 



Nails, physiological anatomy of 345 



connections of, with the skin 347 



growth of 347 



development of 347 



first appearance of 818 



Nares, development of 828 



Nasal duct 727 



Nasal fossae 658 



action of, in phonation 495 



Nasals (division of consonants) 503 



Nasmyth's membrane 189 



Negative variation of the muscular current 480 



of the nerve-current 537 



Nerve-cells 517 



striation of, by the action of silver nitrate. 519 

 connections of, with the fibres and with 



each other 519 



Nerve-centres, structure of 517 



accessory anatomical elements of 519 



connective tissue of (neuroglia) 520 



blood-vessels of 520 



lymphatics of (perivascular canals) 520 



Nerve-current 535 



Nerve- fibres 507 



medullated 507 



axis-cylinder of 508 



striation of. by the action of silver nitrate. 508 



non-medullated 509 



gelatinous, or fibres of Remak 509 



Nerves, structure of 507 



blood-vessels of 511 



branching and course of 511 



terminations of, in the voluntary muscles. 511 



terminations of, in the involuntary mus- 

 cles 512 



terminations of, in glands 512 



sensory, terminations of 513, 516 



degeneration and regeneration of 521 



trophic centres for .' 521 



reunion of 522 



motor and sensory 522, 526 



PAGE 



Nerves, motor, action of 523 



sensory, action of 525 



physiological differences between motor 

 and sensory 526 



artificial union of motor with sensory 526 



excitability of (see Nervous excitabil- 

 ity) 527 



action of electricity upon (see Electricity). 529 



process of dying of 533 



galvanic current from the exterior to the 



cut surface of 535 



spinal 538 



cranial (see Cranial nerves) 539 



development of 819 



Nervi nervorum 511 



Nervous conduction, rapidity of 527 



Nervous excitability 527 



Nervous system, divisions of 505 



physiological anatomy of the tissue of 507 



development of 818 



action of, in the foetus 822 



Nervous tissue, composition of 520 



Neural canal 814 



head-fold of 802 



Neurilemma 507 



Neuroglia of the nerve-centres 520 



of the spinal cord 591 



Neutral point 536 



Nitrogen, proportion of, in the air 135 



exhalation of, in respiration 150 



quantity of, necessary to nutrition 182 



Nitrogen monoxide, effects of respiration of . . . 136 



Nitrogenixed alimentary substances 169 



Non-nitrogenized alimentary substances 170 



action of, in nutrition 439 



Nose, uses of the hairs in 353 



development of 826, 828 



Notochord 815 



Nutrition, quantity and variety of food neces- 

 sary to 181, 182 



general considerations 426 



action of inorganic substances in 428, 429 



substances consumed by the organism 



in 437 



action of nitrogenized substances in 438 



action of non-nitrogenized substances in. . 439 



modifications of, by various conditions. . . . 442 



CTBeirne, sphincter of 269 



Obesity 441 



Obliquus externus, action of, in expiration 125 



internus, action of, in expiration 125 



Odors 661 



(Esophagus, structure of 205 



action of, in deglutition 209 



alternate contraction and relaxation of 209 



development of 824 



Oils (see Fats) 173 



Oken, bodies of 814, 830 



Old age 849 



Oleine 174 



Olfaction, mechanism of 661 



relations of, to the sense of taste 662 



Olfactory cells 660 



Olfactory centre 662 



Olfactory ganglia, or bulbs 660 



