746 



INDEX 



Skin, sensory functions of, 458. 



temperature of, 399. 

 Sleep, 676. 



curve of depth of, 677, Fig. 299. 



effect of loss of, on fatigue, 445. 



Ho well's theory of, 677. 



metabolism in, 676. 

 Small intestine, see Intestine, small. 

 Smell, see Olfactory sensations, Odors, etc. 



as a chemical sense, 54. 



cortical area for, 653, 654, Fig. 294. 



definition of, 451, 483. 



quantitative capacity of, 488. 

 Sneezing, 321. 



Soaps as fat producers, 130. 

 Soaps in intestine, 295. 



injected into blood, 305. 

 Sobbing, 321. 



Sodium chloride, excretion of, in starvation, 

 131. 



importance of, for heart, 25, 182. 



osmotic pressure of, 32. 

 Sodium glycocholate, 254. 

 Sodium taurocholate, 254, 351. 

 Solar spectrum, see Spectrum. 

 Sorbite, 80. 

 Sound, cardiographic, 168, Fig. 55. 



qualities of, 489, 491; see also under 

 Ear. 



transmission of, in ear, 493. 

 Sounds, respiratory, 322. 

 Sounds in swallowing, 282. 

 Sounds of heart, 167, 168. 

 Special nerves, physiology of, 680. 

 Specific action of enzymes, 38, 39. 

 Specific affinities in absorption, 35. 

 Specific dynamic action of foodstuffs, 107. 

 Specific excitants of digestive glands, 264, 271, 



275. 



Specific gravity, changes of, in elementary 

 organisms, 45. 



of blood, 147. 



of sweat, 395. 



of urine, 380. 



Specific response, law of, in nerves, 411. 

 Specific stimuli for end organs, 580. 

 Spectrum, visible rays of, 536. 

 Speech, center of, 631. 



elements of, 506. 



powers of, 661, 662. 



tract in cortex, 662, Fig. 296. 

 Spermatozoa, 691, 692. 



chemotactic influence on, 54, 697. 



thigmotactic influence on, 56, 697. 

 Spermatozoids of fern, chemotaxis, 54. 

 Spherical aberration, 523, Fig. 218; 522. 

 Sphincter ani, 299. 



innervation of, 299. 



tonus of, 583, 588. 



Sphincter Oi urinary bladder, 391. 



innervation of, 393. 

 Sphincter pupillse, innervation of, 528. 

 Sphygmogram, see Pulse curve. 

 Sphygmograph, 215, Fig. 87. 



spring of, 214, Fig. 86. 

 Sphygmomanometer, 202, 203, Fig. 76. 

 Spinal accessory nerve, 681. 

 Spinal cord, centers in, 585. 



columns of, 562, Fig. 254; 589, Fig. 261; 591, 

 Fig. 264; 592, Fig. 265; 593. 



conducting pathways in, 588. 



afferent, 592, Fig. 265; 593, 595, 596. 

 efferent, 593, 594, Fig. 266; 595. 

 motor, 594, Fig. 266. 

 sensory, 592, Fig. 265. 



control of skeletal muscles by, 586. 



electrical stimulation of, 588, 590, Fig. 263. 



extirpation of, 581, 582, 587. 



hemisection of, 595, 596, 640. 



influence of, on vegetative organs, 587. 



rate of propagation in, 589. 



section of, 588, 595, 597. 



structure of, 562, Fig. 254; 563, Fig. 255. 

 Spinal ganglia, 563, Fig. 255. 



chief purpose of, 584. 



delay of impulse in, 585. 

 Spinal nerves, 682. 

 Spinal nerve roots, 562, 564. 



efferent fibers in posterior, 566. 



various functions of, 565. 

 Spirogyra, 18. 

 Spirometer, 320, Fig. 128. 



Splanchnic nerve, 688; see also Sympathetic 

 nerves. 



as secretory nerve of pancreas, 269. 



as vasomotor nerve, 233, 235. 



connection of, with ganglion cells, 582. 



intestinal movements and, 288. 



movements of stomach and, 284. 



respiration and 331. 

 Spleen, function of, 368. 



trypsin and, 252. 

 Spongioplasm, 19. 

 Spontaneous generation, 16. 

 Squalius cephalus, brain of, 618, Fig. 274. 

 Squint, 555. 



Stapedius muscle, 494, Fig. 196; 497. 

 Stapes, 494, Fig. 196; 496. 

 Staphylococcus pyoqenes albus, 54. 

 Starch, see Carbohydrates. 



absorbed, 139. 



action of saliva on, 246. 



digestion of, in intestine, 251, 297. 

 in mouth, 291. 

 in stomach, 291. 

 formation of, 23. 

 kinds of, 81. 

 Starch cellulose, 81. 



