742 



INDEX. 



Tongue, 551 



papilla of, 134 

 Tonic contraction, 318 

 Tooth, crusta petrosa, 114 



dentine, 113 



enamel, 113 



pulp cavity, 113 



Torula cerevisia (yeast plant), 91 

 Touch corpuscles (Meissner's), 538 



sense of locality, 541 



sense of pressure, 543 



temperature sense, 545 

 Trabeculse, 197 



of spleen, 368 

 Triangularis sterni, 338 

 Tricuspid valve, 260 

 Trigeminus nerve, 525 

 Trochlear nerve, 523 

 Trommer's test, 149 

 Trypsin, 167 

 Tubuli seminiferi, 649 

 Tunica adventitia, 286 



fibrosa, 650 



granulosa, 651 



intima, 286 



media, 286 



propria, 651 



vasculosa, 651 



Tuning-fork, demonstration of vi- 

 brations, 596 



uses of, in measuring time, 461 

 Tympanic membrane, 600 

 Tyrosin, 76, 189 



TT MB [LIC AL vessels, 699 

 U ^ Umbilicus, 660 

 Unicellular organisms, 40 

 Unstriated muscle, 442, 475 

 Urachus, 662 

 Urea, 75, 400 



source of, 407 



preparation of, 401 



volumetric estimation of, 401 

 Ureters, 411 

 Uric acid, 76, 402 

 Urinary calculi, 407 



excretion, 390 



secretion, nervous mechanism 



of, 410 

 Urine, 394 



abnormal constituents of, 405 



chemical composition of, 400 



coloring matters of the, 404 



Urine, gases in, 405 



inorganic salts in 404 

 passage into bladder, 410 

 secretion of, 396 

 specific gravity of, 395 



Uterus, 667 



Utricle of ear, 714 



YACUOLES, 33 

 of paramoecium, 95 

 Vagus nerve, 282, 531 



effect on heart, 282 



effect on respiration, 346 

 Valsalva's experiment, 603 

 Valvulae conniventes, 185 

 Vascular system, development of, 693 

 Vas-deferens, development of, 689 

 Vasomotor centre in medulla oblon- 

 gata, 632 



centres in spinal cord, 626 



nerves, 317 

 Vegetable cells, 33 



action of light on, 97 

 Vegetable food, 108 

 Veins, 288 



development of the, 702 

 Velocity of blood current, 313 

 Venae advehentes, 702 

 Vena porta, 373 

 Venous blood, 355 



system, development of the, 703 

 Ventilation, 360 

 Ventricles of brain, 629 



of heart, 260 



Vertebral plates of embryo, 671 

 Vesicular breathing, 343 

 Vestibule of ear, 602 

 Villi, vessels of, 187 

 Vision, 556 



accommodation, 570 



binocular, 593 



inversion of image, 566 



light impressions, 580 



refraction, 564 

 Visual perceptions, 590 



purple, 587 

 Vital capacity, 342 



phenomena, 32 



point (noaud vital), 345 

 Vitellin, 69 

 Vitelline membrane, 652 



veins, 695 

 Vitreous humor, 561 



