718 



NDEX 



Symmetry, 75, 77 

 Sympathetic ganglion, 426 

 nervous system, 426, 427 

 Sympathetics, cervical, 483 

 Sympathin, 428 

 Synapse, 411, 412 

 Synapsis, 556, 557 

 Syncytium, 74, 75 

 Syndactyly, 654 

 Syntira uvella, 124, 125 

 Systemic arch, 314, 316 

 Systole, 497, 498 



Tactile corpuscles, 394 

 Taenia soginata, 172 

 Taenia solium, 173 

 Tapeworms, 171 

 Tarantula, 247 

 Tarsal, 305, 306, 376 

 Tarsier, 350, 351 

 Tarsus, 222, 223 

 Taste, 395 



bud, 395 

 Tatum, E. L., 586 

 Taylor, C. V., 135 

 Taxonomy, 16, 105 

 Tectoral membrane, 406, 407 

 Teeth, 369, 371, 454, 455 

 Telencephalon, 307, 310, 420 

 Teleost, 291, 293, 294 

 Telophase, 552, 553, 554 

 Temperature, 88 



regulation, 516 

 Temporal lobe, 424, 425 

 Tendon, 72, 303, 304, 385, 386 

 Terrapene ornata, 326 

 Tergum, 207 

 Tertiary (period), 625 



Testis, 165, 167, 172, 228, 234, 260, 437, 538, 540 

 Testosterone, 437 

 Tetanus, 388 

 Tetrad, 556, 557 

 Tetrahijmena geleii, 109, 116 

 Tetraploidy, 609 



Theory of Natural Selection, 652-656 

 Thiamine, 470, 471 

 Thoracic cavity, 477 



Thoracolumbar nervous system, 426, 427 

 Thorax, 222, 223 

 Thrombin, 507 

 Thromboplastin, 507 

 Thyroid, 434, 442, 444 

 Thyrotrophin, 447, 448 

 Thysanura, 221 



Tibia, 222, 223, 305, 306, 376, 382 

 Tibiale, 305 



Tibialis anterior (anticus), 304, 386 

 Tiedemann bodies, 271 

 Tiger, 342 



saber tooth, 626, 627 

 Tissue, 70 



culture, 84 

 Toad. 300 



Tobacco, use of, 474 



Tongue, 307, 310, 311 



Tongue worm. See Acorn worm 



Tornaria larva, 282, 283 



Tortoise, 326 



Totipotent, 571, 572 



Toxin. See Antigen 



Toxoid, 515 



Trachea, 226, 227, 477, 478, 479 



Transportation system. See Circulatory systems 



Transverse process, 380 



Trapezius, 386 



Trematoda, 161, 166 



Trembley, Abraham, 145, 146 



Triassic (period), 321, 625 



Triceps brachii, 385 



Triceratops, 324 



Trichinella, 177, 180, 181 



Trichocysts, 114, 115 



Trigeminal nerve, 307 



Tripoblastic, 161 



Trochanter, 223 



Trochlear nerve, 307 



Trochophore, 188, 253 



Trypanosomes, 125, 126 



Trypsin, 44, 463, 464 



Trypsinogen, 463 



Tschermak, 582 



Tsetse fly, 126 



Tuatara, 324, 325 



Tube feet, 270 



Tubifex, 198 



Tunicate, 283, 284 



Turbellaria, 161 



Turbinate, 477 



Turtle, 325, 326 



Twins, fraternal, 611 



monozygotic, 611 



Siamese, 572, 573 

 Tijrannosaiirus, 321, 323 

 Tympanum. 226, 227, 405 

 Typhlosole, 191, 192, 257, 258 

 2N. See Diploid 



Uca, 216 



Ulna, 305, 306, 376, 381 



Ulva, 530, 531 



Umbilical cord, 534, 535, 568 



Umbo, 255 



Urea, 82, 520 



Urease, 44 



Urethra, 538, 539, 540 



Urine, 520 



formation, 525 

 Urochordata, 283 



Urogenital duct, 317, 318, 523, 524 

 Urosalpinx, 262 

 Urostyle, 305 



Uterus, 172, 173, 318, 319, 523, 524, 539, 541 

 Utriculus, 408, 409 



Vagina, 173, 228, 234, 523, 524, 535 

 Valve, auricular- ventricular, 313 



