IXDEX. 



Retina, continued. 

 focal distance of, 649. 

 function of, 641. 

 image on, now formed distinctly, 



647. 



inversion of, how corrected, 653. 

 insensible at entrance of optic 



nerve, 663. 

 insufficient alone for distinct 



vision, 642. 

 in quadrupeds, 667. 

 reciprocal action of parts of, 66 1. 

 in relation to direction of vision, 



656. 



to motion of bodies, 657. 

 to single vision, 664. 

 to size of field of vision, 654. 

 structure of, 638. 

 Rhythm of heart, cause of, 128. 



Sec Heart, 

 respiratory, 200. 

 Rigor mortis, 592. 



affects all classes of muscles, 594. 

 phenomena and causes of, 593. 

 Rima glottidis, movements of in re- 



spiration, 200. 

 Rods of Corti, 678. 



use of, 692. 

 Root of nail, 431. 

 Root-sheath of hair, 431. 

 Roots of spinal nerves, 490, 493. 

 anterior and posterior, special pro- 

 perties of, 494. 

 Rotation, 



following injury of crura cerebelli, 



530- 

 produced by dividing the crura 



cerebri, 521 

 Rouleaux, formation of in blood, 62, 



73- 



Rubbing, influence on cutaneous ab- 

 sorption, 437. 



Rugce or folds of stomach, 266. 



Rumination, 290. 



Running, mechanism of, 602. 



Rut or heat, 724. 



S. 



Saccharine principles of food, diges- 

 tion of, 286. 

 action of bile on, 332. 

 absorption of, 339. 



Sacculus, 678. 



Safety-valve action of tricuspid 



valve, 115. 



Saline constituents of bile, 324. 

 Saline constituents of blood, 82. 



use of, 97. 

 of urine, 460. 



matters, absorption of, 369. 

 Saliva, action of on food, 262. 



on starch, 263. 

 composition of, 260. 

 digestive properties of, 262. 

 mechanical purposes of, 261. 

 organs for production of, 258. 

 physical properties of, 259. 

 purposes of, 261. 

 quantity secreted, 260. 

 rate of secretion, ib. 

 reaction of, 259. 

 relation to gastric fluid, 263. 

 Salivary glands, 256. 



development of, 774. 

 Salts, alkaline and earthy, influence 



on coagulation, 65. 

 Sarcode, 20. 

 Sarcolemma, 584. 

 Sarcous elements, 585. 

 Scala media, 677. 

 tympani, 677. 

 vestibuli, ib. 

 Sclerotic, 637, 645. 

 Scurvy from want of vegetables, 255. 

 Season, influence on carbonic acid 



expired, 213. 

 Sebaceous glands, 428. 

 their secretion, 432. 

 Secreting glands, 401. 

 aggregated, 403. 

 convoluted tubular, 403. 

 tubular or simple, 401. 

 Secreting membranes. See Mucor.s 



and serous membranes. 

 Secretion, 394. 



action of cells and nuclei in, 404. 

 apparatus necessary for, 395. 

 circumstances influencing, 407. 

 discharge of, 406. 

 general nature of, 394. 

 influence of nervous system on, 



408. 



of sympathetic nerve, 573. 

 of quantity of blood, 407. 

 process of, 394. 

 relation or antagonism of, 409. 



