INDEX 



519 



Sigmoid flexure, 128. 

 Silver sulphide, 15. 

 Skeleton, 221-251. 



appendicular, 230. 



axial, 224. 



bones of, 222. 



external, 29, 221, 252. 



hygiene of, 248. 



in lower animals, 252-263. 



internal, 29. 221, 252. 

 Skin, 353-363'. 



as an excretory organ, 361. 



of lower animals, 374-382. 



functions of, 361. 



hygiene of, 363. 



modifications of, 353-356. 



structure of, 353. 

 Skull, 223, 233. 



uses of, 235, 236. 

 Smell, sensation of, 448-450. 



in lower animals, 482. 

 Snails, 345. 

 Sneezing, 331. 

 Soaps, 126, 140. 

 Sobbing, 331. 

 Sore throat, 208, 335. 

 Sound, 474, 489, 490. 

 Special senses (see Sensation) . 

 Speech, 486. 

 Sphenoids, 234. 

 Sphincter pylorus, 112, 117. 

 Spinal accessory nerve, 394. 

 Spinal column, 222, 224, 228. 

 Spinal cord, 398. 



center reflex action, 417. 



connection with sympathetic 

 system, 401. 



diseases of, 424. 



functions of, 417. 



membranes of, 399. 



of the frog, 389, 390. 



structure, 401. 

 Spinal nerves, 400, 401, 402. 

 Spinous process, 226. 

 Spiracles, insect, 346. 

 Spitting, 332. 



Spleen, 168. 



Sponges, 148, 212, 237, 253, 341, 



378. 

 Sprains, 250. 

 Spyrogyra, 32. 

 Squameous epithelium, 40. 

 Standing, 290, 291. 

 Stapes (bone), 235, 472. 

 Starch, absorption, 140. 



composition, 27, 53, 54. 



digestion of, 105, 126. 



in blood, 163. 

 Starfish, 254, 342. 

 Steapsin, 125, 126. 

 Sterilizing, 500. 

 Sternum, 228, 229. 

 Stimulants, 74. 

 Stirrup bones, 235. 

 Stomach, as a storehouse, 116. 



curvatures of, 112. 



enzymes of, 113. 



glands of, 113. 



method of action, 117. 



structure. 111. 

 Strangulation, 331. 

 Striated muscle, 266, 267, 269, 



270, 272-274. 

 Stroma, 166. 

 Structure, 8, 28. 

 Subcutaneous layer, 355. 

 Sublingual glands, 102. 

 Submaxillary glands, 102. 

 Submucous coat. 111. 

 Succus entericus, 127. 

 Suffocation, 331. 

 Sugar, composition, 27. 



forms, 53-55. 



in blood, 163, 164. 



in muscle, 277. 



tests for, 54, 55. 

 Sulphur, 15. 



Suspensory ligament, 458. 

 Sutures, 235, 243, 247. 

 Swallowing, 107. 

 Sweat, 356. 

 Sweat glands, 356, 357. 



