Index - 721 



Stomach, 130, 296, 297, 303-05; churning move- 

 ments of, 308-10; emptying, 310; liquefaction 

 of meal, factors involved in, 310; nerve supply 

 of, 305; size and shape of, 304-05 



Stomata, 242, 249, 250 



Storage, problem among plants, 257 



Storage parenchyma, 243, 245, 246 



Storage tissue, 240, 242 



Strata, geological, relative ages of, 562-70 



Strengthening tissues, 243-44 



Streplobacillus, 176, 602 



Streptococcus, 176, 602 



Streptomycin, 176 



Stress theory, 41 1 



Striations, 286 



Stroma. 160 



Sublingual glands. 300. 301 



Submaxillary glands, 300, 301 



Submucosa, 298 



Substances, 67; mixtures vs., 68-69; organic (see 

 Organic substances) 



Substrate, 100, 101; -enzyme combinations, 104-06 



Succession, ecological, 589-90 



Succinic dehydrogenase, 101, 104, 108 



Sucrase, 103, 174, 314 



Sucrose, 76, 79 



Suctoria, 576, 628 



Sugars, 76, 79-80, 339; conversion to glucose, 

 340-41 



Sulfur bacteria, 181 



Sulfur bond, high-energy, 154 



Sumner, J. B., 100 



Supersonics, 429 



Suspensions, 93 



Swallowing, reflexes of, 303 



Swann, M. M., 48 



Swarm spores, 57 



Symbiosis, 179 



Sympathetic nerves, 305 



Synapses, 54, 453-54, 477, 479, 491, 494 



Synaptic resistance, 457 



Synaptic summation, 457 



Syncytium, 17 



Syndrome, Klinefelter, 507, 508: Turner, 507, 508 



Synge, R. L. M., 164 



Synthesis, carbohydrate, in green plants, 169; 

 dehydration, 79; glycogen, 150-51; of organic 

 compounds, 132; protein, 133-35, 137-39, 169 



Szent-Gyorgyi, A., 347 



Tansley, A. G., 587 

 Tapeworms, 636, 639-41 

 Taste, receptors of, 420-21 

 Taste buds, 300, 302, 421 

 Taxonomy, 554, 592 



Teeth, 284, 298, 299-300 



Telolecithal eggs. 272, 277 



Telophase, in mitosis, 42, 43, 45, 46-47 



Temperature as abiotic environment, 581-83; 

 enzymes in relation to, 109-10 



Template RNA, 525 



Tendon of skeletal muscles, 431, 432 



Tentacles, 292 



Teredo, 651 



Tertiary period, 559, 563, 565, 569 



Testes. 52. 380. 383, 384, 385; endocrine gland, 

 399-400; undescended. 399 



Testosterone, 383, 399, 411; isolation of, 400 



Tetanus, 434-35 



Tetany, 405 



Tetrads, 54 



Thallophyta, 594-609; Chlorophyta, 596-97; 

 Chry so phyla, 597-98; Cyanophyta, 594-95; 

 Euglenophyta, 596; Eumycophyta, 604-09; life 

 cycle of, 208, 209-12; Myxomycophyta, 602-01; 

 Phaeophyta, 599-600; Pyrropkyta, 598-99; Rho- 

 dophyta, 600-01; Schizomycophyta, 601-02 



Theory. 14 



Therapsida, 673 



Thermal movements, 92, 112 



Thermal properties of water, 72 



Thermodynamic laws, 143 



Thiamine, 89. 104. 348, 351 



Thiamine pyrophosphate, 152 



Thigmotropisms, 264 



Thiospirillum, 181 



Thirst, sense of, 426 



Thrombase, 323, 324 



Thrombocytes, 289, 321 



Thromboplastin, 323 



Thromboplastinogen, 323 



Thromboplastinogenase, 323, 324 



Thrombus, 323 



Thrush, 607 



Thymectomy, 336 



Thymine, 134, 521 



Thymus glands, 398, 414; role of, 335-37 



Thyroid gland, 344, 398, 402-05 



Thyrotrophin (TSH), 410, 411 



Thyroxin, 346 



Ticks, 655 



Time, geological, eras and periods of, 564, 565 



Tissues, 37, 38; blood and lymph, relationship 

 between, 329-30; bryophytes, 241-42; connec- 

 tive (sustentive), 288-90; differentiation of, 

 285-90; epidermal, 239, 241. 242-43; epithelial, 

 285-86; erectile, 385-86; fibrillar connective, 

 288-89; fundamental, 285; green parenchyma, 

 243, 250; lymphoid, 334; meristem, 242, 261, 

 262; muscle, 286-87; nerve, 287-88; origin and 

 nature of body, 285-90; plants, higher, 243; 

 primitive vascular, 240, 241; storage, 240, 242; 



