656 



INDEX. 



Voice, 474 



of boys, 484 

 compass of, 483 



conditions on which strength de- 

 pends, 485 

 human, produced by vibration of 



vocal cords, 474, 485 

 impaired by destruction of acces- 

 sory nerve, 443 

 in eunuchs, 484 

 influence of age on, 484 



of arches of palate and uvula, 



486 



of epiglottis, 481 

 of sex, 483 



of ventricles of larynx, 486 

 of vocal cords, 476, 481 

 in male and female, 483 



cause of different pitch, 484 

 modulations of, 485 

 natural and falsetto, 485 

 peculiar characters of, 484 

 varieties of, 483 

 Volatile bodies, influence of on sense 



of smell, 496, 497 

 Voluntary muscles. See Muscles. 

 Vomiting, action of stomach in, 232 

 mechanism of, 183 

 influence of spinal cord in, 399 

 voluntary and acquired, 233 

 Vowels and consonants, 487 

 Vulvo-vaginal glands, 563 



Walking, muscular action in, 469, 472 

 Warm-blooded animals, 192 

 Water, absorbed by skin, 347 



by stomach, 226 

 in blood, variations in, 73 

 conduction of sound through, 537 



Water deficient in thirst, 77 



exhaled from lungs, 178, 346 



from skin, 344 

 forms large part of human body, 



25 



influence of on coagulation of 

 blood, 63 



on decomposition, 20 

 in urine, excretion of, 354 



variations in, 359 

 vapor of in atmosphere, 1 73 

 Wave of blood in the pulse, 127 

 Weight, relation to capacity of chest, 



167 



sensation of, 557 



White corpuscles. See Blood-corpus- 

 cles, White ; and Lymph-cor- 

 puscles. 



fibro-cartilage, 43-45 

 White substance of nerve-fibre, 370 

 Will, reflex actions amenable to, 398, 



399 



transmission of through cord, 394 

 Willis, circle of, 151 

 Wolffian bodies, 609 



Yelk, or viteilus, 564 



changes of, in Fallopian tube, 579 

 in uterus, 581 



cleaving of, 579 



constriction of by ventral lamina, 



583 



Yelk-sac, 585 

 Yellow elastic fibre, 40 



fibro-cartilage, 43, 45 



spot of Sommering, 501, 504 



Zona pellucida, 564, 579 



