INDEX. 



649 



Season, influence on carbonic acid ex- 

 pired, 1 75 

 Sebaceous glands, 339 



their secretion, 344 

 Secreting glands, 319 

 aggregated, 319 

 convoluted tubular, 321 

 tubular or simple, 319 

 Secreting membranes. See Mucous 



and Serous Membranes. 

 Secretion, 313 



action of cells snd nuclei in, 322 

 apparatus necessary for, 314 

 circumstances influencing, 324 

 discharge of, 323 

 general nature of, 313 

 influence of nervous system on, 



324 



of sj'inpathetic nerve, 450 

 of quantity of blood, 324 

 process of, 313 



relation or antagonism of, 325 

 resemblance to nutrition, 322 

 by membrance, 314 

 mucous, 316 

 serous, 315 

 synovia!, 316 

 in vascular glands, 324 

 Selection of materials for absorption, 



290 



Semicircular canals of ear, 530 

 development of, 606 

 use of, 54 1 

 Semilunar valves, 96 



action of, 102 

 Seminal fluid, 574 



composition of, 577 

 corpuscles and granules of, 



574 



emission of, a reflex act, 599 

 influence on ovum and em- 

 bryo, 578 

 filaments, 574 



purpose of, 574 

 tubes, 573 

 vesicles, 576 



Sensation attended by ideas, 558 

 cerebral nerves of, 524 

 common, 489 



conditions necessary to, 558 

 conduction of in spinal cord, 393 

 contrasts in, 558 

 definition of, 489 

 excited by mind, 559 



by internal causes, 491 

 of hunger, 234 



influence of attention on, 494, 516 

 influence of mind necessary to, 



558 



of motion, how perceived, 492 

 muscular, 461, 557, 558 



Sensation of necessity of breathing, 



235 

 nerves of, 377 



convey impressions to centres 



only, 379 

 impressions on referred to 



periphery, 380, 381 

 laws of action of, 386 

 perceived in cerebrum, 419, 420 

 preservation of in paralyzed 



nerves, 382 



referred to exterior, 382 

 special, 489 

 stimuli of, 377, 378 



of special, 490-492 

 in stumps, 381 

 subjective, 558 

 of thirst, 234 

 sympathetic, 385 

 touch a modification of, 554 

 transference and radiation of, 



385, 395 



two kinds of, 489 

 of volatile bodies, 493 

 of weight, 557 

 Sense, of hearing, 527. (See Hearing, 



Sound. 



of sight, 499. (See Vision, 

 of smell, 494. See Smell, 

 of taste, 547. See Taste, 

 of touch. See Touch, 

 muscular, 416, 557, 558 

 special, nerves of, 424 

 organs of, development of, 603 

 Senses, special, general properties of, 



489 

 action of external and internal 



stimuli on, 491 

 impairment of from division of 



the facial nerve, 434 

 from division of the fifth nerve, 



431 

 influence of attention on, 494 



of internal impressions on 



nerves of, 491 



qualities of external matter per- 

 ceived by, 490, 492 

 special nerves of, 490 

 stimulus excites in each nerve its 



own sensation, 490 

 Sensitive impressions, conduction of, 



380 



by spinal cord, 392, 393 

 reference of, 380-382 

 nerves, 378 

 Sensory ganglia, 413 

 Septum between auricles, formation 



of, 600 

 between ventricles, formation of, 



600 

 Serosity of blood, 73 



