INDEX. 



825 



Urinary bladder, development of, 779 



Urobiline, 99 



Urochrome, 99 



Urohematine, 99 



Urosaciue, 99 



Urosine, 99 



Uterus, 692, 693 



mucous membrane of, 750 

 changes in, after impregnation, 751 

 regeneration of, after delivery, 766 

 development of, 789 

 position of, at birth, 790 



Uterus bicornis, 789 



Utricle, of the internal ear, 655 



yALVE, Eustachian, 804 

 V of the foramen ovale, 806 



of Vieussens, 525 

 Valves, of the heart, 320, 323 



of the veins, 342 



of the lymphatics, 355, 370 

 Valvulse conniventes, 135 



formation of, 776 

 Vasa deferentia, 698 



formation of, 786, 787 

 Vascular system, development of, 791 

 Vapor, watery, exhalation of, 43 



from the lungs, 288 



from the skin, 316 



Vegetable food, necessary to man, 114 

 Vegetables, as food, 122 



production of organic matter in, 60 



production of fat in, 69 



green coloring matter of, 101 



absorption of carbonic acid and ex- 

 halation of oxygen by, 60, 131, 270 



respiration in, 270 



production of heat in, 301, 302 

 Vegetative functions, 31 

 Veins, 340 



motion of the blood in, 341 



action of the valves of, 342 



rapidity of blood-current in, 313 



omphalo-mesenteric, 792 



umbilical, 794 



vertebral, 797 



Vena azygos, major and minor, forma- 

 tion of, 799 



Venje cavse, formation of, 797, 798 

 Venous system, development of, 797 

 Ventricles, of the heart, situation of, 319 



action of, 320 



muscular fibres of, 328 

 Vernix caseosa, 774 

 Vertebral arteries, 792, 795 

 Vertebral veins, 797 

 Vertebrae, primitive, 735 



permanent, formation of, 737, 772 

 Vesicle, umbilical, 738, 745, 776 

 Vesicles, adipose, 72 



cerebral, 769 



Vesicles, pulmonary, 274 



seminal, 698 

 Vesiculfe seminales, 698 



formation of, 787 

 Vestibule, of the internal ear, 654 

 Vieussens, valve of, 525 

 Villi, of stomach, 152 



of intestine, 189, 194 



of chorion, 747 

 Visceral folds, 781 

 Vision, sense of, 607 



acuteness of, 626 



field of, 627 



line of direct, 628 



point of distinct, 629 



erect, 638 



binocular, 639 

 Vital phenomena, 29 

 Vitellus, 685, 686 



segmentation of, 722 



formation of, in foetus, 790 

 Vitelline circulation, 791 

 Vitelline membrane, 685 

 Vitelline spheres, 722 

 Vitreous body, of the eye, 612 

 Voice, formation of, in the larynx, 565 



loss of, after division of the pneumo- 

 gastric nerves, 566 



of the spinal accessory nerves, 573 

 Volition, seat of, in the tuber annulare, 



501 

 Vomiting, how produced, 556 



WATER, as a proximate principle, 40 

 proportion of, in the tissues and 



fluids, 41 

 probable formation of, in the system, 



42 

 discharge of, from the body, 43, 288, 



316 

 Weight of organs, comparative, in the 



foetus at term and adult, 810 

 Wheaten bread, composition of, 121 

 White globules of the blood, 254 

 amoeboid movements of, 255 

 sluggish movement of, in the circula- 

 tion, 348 

 White substance of the nervous system, 



409 

 Wolflfian bodies, 784 



atrophy and disappearance of, 785 

 Woorara, action of, on motor nerves, 

 422 



YEAST-FUNGUS, 65 

 Yolk, 686, 689, 729 



17 ON A pellucida, 685 



53 



