INDEX. 



8I 5 



Secretion, continued. 

 resemblance to nutrition, 405. 

 by membranes, 395. 

 mucous, 398. 

 serous, 395. 

 synovial, 398. 

 in vascular glands, 408. 

 Selection of materials for absorption, 



Semicircular canals of ear, 676. 

 development of, 773. 

 use of. 689. 

 Similunar valves, 108. 



action of, 115. 

 Seminal fluid, 734. 



composition of, 738. 



corpuscles and granules of, 734. 



emission of, a reflex act, 505. 



influence on ovum and embryo, 



738. 

 filaments, 734. 



purpose of, 735. 

 tubes, 732. 

 vesicles, 735. 



Sensation attended by ideas, 711. 

 cerebral nerves of, 538. 

 common, 623. 



conditions necessary to, 711. 

 conduction of in spinal cord, 496. 

 contrasts in, 712. 

 definition of, 623 

 excited by mind, 712. 



by internal causes, 626. 

 of hunger, 291. 



influence of attention on, 629, 658. 

 influence of mind necessary to, 71 1. 

 of motion, how perceived, 627. 



muscular, 588, 709-711. 

 of necessity of breathing, 292. 

 nerves of, 475. 



convey impressions to centres 

 only, 478. 



impressions on referred to peri- 

 phery, 479-48i. 



laws of action of, 488. 

 perceived in cerebrum, 532. 

 preservation of in paralysed 



nerves, 482. 



referred to exterior, 482. 

 special, 623. 

 stimuli of, 475-477. 



of special, 624-626. 

 in stumps, 481. 

 subjective, 712. 



Sensation, continued. 

 of thirst, 291. 

 sympathetic, 487. 

 touch a modification of, 706. 

 transference and radiation of, 



487, 499- 



two kinds of, 623. 

 of volatile bodies, 628. 

 of weight, 710. 

 Sense, 



of hearing, 671. See Hearing, 



Sound. 



of sight, 636. Sec Vision. 

 of smell, ib. Sec Smell. 

 of taste, 697. Sec Taste, 

 of touch. See Touch, 

 muscular, 528, 709-711. 

 special, nerves of, 538. 

 organs of, development of, 770. 

 Senses, special, general properties 



of, 623. 

 action of external and internal 



stimuli on, 625. 

 impairment of from division of 



the facial nerve, 551. 

 from division of the fifth nerve, 



547- 



influence of attention on, 629. 

 of internal impressions on nerves 



of, 626. 



qualities of external matter per- 

 ceived by, 623, 627. 

 special nerves of, 623. 

 stimulus excites in each nerve its 



own sensation, 624. 

 Sensitive impressions, conduction of, 



479- 



by spinal cord, 496, 498. 

 reference of, 480-482. 

 nerves, 476. 

 Sensory ganglia, 523. 

 Septum between auricles, formation 



of, 767. 

 between ventricles, formation of. 



767. 



Serosity of blood, 79. 

 Serous layer of blastodermic mem- 

 brane, 742, 745. 

 Serous membranes, 395. 

 arrangement of, 396. 

 communication of lymphatics 



with, 352. 

 epithelium of, 395. 

 fluid secreted by, 397. 



