INDEX. 



749 



Veins, development of the, 706 

 Velocity of blood current, 308 

 Venae advehentes, 703 

 Vena porta, 369 

 Venous blood, 351 



system, development of the, 707 

 Ventilation, 357 

 Ventricles of brain, 629 



of heart, 254 

 Vesicular breathing, 339 

 Vestibule of ear, 601 

 Vertebral plates of embryo, 673 

 Villi, vessels of, 180 

 Vision, 554 



accommodation, 568 



binocular, 592 



inversion of image, 565 



light impressions, 578 



refraction, 563 

 Visual perceptions, 588 



purple, 585 

 Vital capacity, 338 



phenomena, 23 



point (noeud vital), 340 

 Vitellin, 61 

 Vitelline membrane, 654 



veins, 698 



Vitreous humor, 559 

 Vocal cords, 483 

 Vocalization, mechanism of, 486 

 Voice, 483 



Voice, nervous mechanism of 491 

 properties of the human, 488 



Volition, 626 



Vomiting, 115 



Vorticella, 35, 87 



ciliary motion of, 87 

 contractile stalk of, 87 



Walking and running, 481 



Warm-blooded animals, 425 



Water, 71 



Wharton's duct, 118 



White substance of Schwann, 496 



Wolffian bodies, 690 



Xanthin in urine, 400 



Yawning, 346 

 Yeast plant, 82 

 Yellow elastic tissue, 50 

 Yellow spot, 578 



structure of, 583 

 Yolk sac, the, 653 



Zona pellucida, 654 

 Zymogen, 159 



