566 



INDEX. 



Tubercular diathesis, 626, 638, 639. 

 Tunicata, nervous system of, 850, 851. 

 Tympanum, 951. 

 Tyrosin, 170. 



liberation, 633. 



Umbilical vessels, 818. 



Umbilical vesicle, 815. 



Urea, 730, 731. 



Uric acid, 732, 733. 



Urine, composition and properties of, 729- 

 740; effects of suppression of, 741. 



Uterus, comparative structure of, 793 ; partu- 

 rient action of, 827. 



Vascular area, 551, 813, 814. 



Vegetable kingdom, office of, 15. 



Vegetation, influence of Light upon, 79-92; 

 influence of Heat upon, 98-107; influence 

 of Electricity upon, 143-145. 



Veins, movement of blood in, 60-5610 ; pul- 

 sation in, 607, 608. 



Venous congestion, 609, 610. 



Villi of mucous membrane, 243, 492 ; of yolk- 

 bag, 244 ; of placenta, 245. 



Vital Actions, 16-18,47-51. 



Vital Forces, 17, 24, 52; their relations to 

 each other, 58-60 ; to the Physical forces, 

 61-63. 



Vital Stimuli, 61. 



Vitellus, 784, 794; segmentation of, 805. 



Vitreous body of eye, 276. 



Vocal ligaments, 974-979. 



Voice, production of, 973-979. 



Voluntary movements, nature of, 923. 



Vowel sounds, production of, 981. 



White fibrous tissue, 189, 191. 

 Worm tribes, circulation in, 552; respiration 

 in, 657. 



Yellow fibrous tissue, 190, 192. 

 Yolk, see Vitellus. 



Zona pellucida, 795. 

 Zoospores of Algs, 779. 



