INDEX 



Valves of heart, 167 



action of, 176 



of veins, 173 

 Vascularization, 48 

 Vasoconstrictor activity, 240 



center, 235 



nerves, 234, 241, 248 



reflexes, 236 

 Vasodilator activity, 240 



center, 240 



nerves, 233, 238 



reflexes, 240 

 Vasomotor centers, 576 



changes, 264 



nerves, 232, 242 



tone, 235 

 Veins, 172 



blood pressure in, 215 



structure of, 172 



valves of, 173 



vasoconstrictor nerves in, 248 

 Venous flow, 223 



velocity of, 224 

 Ventilation, 304 



Ventricles of heart, action of, 175 

 Vesico-spinal center, 558 

 Vesiculae seminales, 716 

 Vesicular breathing, 282 

 Vicq d'Azyr, bundle of, 586 

 Villi, 391 



Visceral sensations, 562 

 Vision, accommodation of, 677, 

 679 



binocular, 699 



field of, 692 



limits of, 695, 707, 712 



localization of, 693 



mechanism of accommodation, 

 679 



range of distinct, 680 

 Visual acuity, 713 



center, 604 



judgments, 702 



purple, 693 



Visual sensations, 687 



after-images, 689 

 intensity of, 689 

 sense, 664 

 Vital capacity, 283, 310 



phenomena, i 

 Vitiated air, effects of, 304 

 Vocal cords, 267, 510 



movements of, 517 

 Voice, 510 



difference between male and 



female, 519, 520 

 in singing and speaking, 518 

 production of, 510 

 quality of, 520 

 vocal range of, 519 

 Vomiting, 356 



action of abdominal muscles, 356 

 of diaphragm, 356 

 of pylorus, 356 

 center for, 356 

 nervous mechanism of, 357 

 Vowels, 521 



WALKING, 505 



Wallerian degeneration, 537, 547 



Water, 104 



absorption of, in intestines, 395 

 amount excreted, 422, 433 

 in expired air, 288 

 in the body, 104 

 as food, 326 

 rigor, 492 



Weyl's reaction, 429 

 White fibrous tissue, 34 



development of, 37 

 Wreath, 20 



XANTHO-PROTEIC reaction, 107 



YELLOW elastic tissue, 34 



development of, 37 



ZYMOGENS, 327 



