784 



INDEX. 



Vitelline spheres, 658 

 Vitiated air, effects of, 199 

 Vitreous humor, 594 

 Vocal cords, 438 et seq. 



action of, in respiratory actions, 184 

 et seq. 



approximation of, effect on height of 

 note, 446 



longer in males than in females, 444 



position of, how modified, 442 



vibrations of, cause voice, 438 

 Voice, 443 



of boys, 445 



compass of, 445 



conditions on which strength depends, 

 446 



human, produced by vibration of vocal 

 cords, 443 



in eunuchs, 445 



influence of age on, 445 

 of arches of palate and uvula, 447 

 of epiglottis, 443 



of sex, 444 



of ventricles of larynx, 447 



of vocal cords, 443 



in male and female, 444 

 cause of different pitch, 444 



modulations of, 444 



natural and falsetto, 445 



peculiar characters of, 444 



varieties of, 443 et seq. 

 Vomiting, 258 



action of stomach in, 258 



centre, 497 



nerve-actions in, 259 



voluntary and acquired, 259 

 Vowels and consonants, 447 

 Vulvo-vaginal or Duverney's glands, 640 



W. 



Walking, 423 

 Water, 751 

 absorbed by skin, 352 



by stomach, 254 

 amount, 

 in blood, variations in, 89, 90 



Water continued. 



exhaled from lungs, 190 

 from skin, 350 



forms large part of human body, 751 



influence of on decomposition, 733 



in urine, excretion of, 363 

 variations in, 363 



loss of, from body, 752 

 uses, 752 



quantity in various tissues, 752 



source, 752 



vapor of, in atmosphere, 190 

 Wave of blood, causing the pulse, 137 



velocity of, 137 



White corpuscles, 94. See Blood-corpus- 

 cles, white ; and Lymph-corpuscles. 

 White fibre-cartilage, 42 



fibrous tissue, 32 

 Willis, circle of, 162 

 Wolffian bodies, 706 et seq. 

 Wooldridge, 69 

 Work of heart, 128 



X. 



Xanthin, 370, 744 

 Xantho-proteic reaction, 734 



Y. 



Yawning, 196 

 Yelk, or vitellus, 637 



changes of, in Fallopian tube, 658 



cleaving of, 658 



constriction of, by ventral laminae, 633 

 Yelk-sac, 669 et seq 

 Yellow elastic fibre, 33 



fibro-cartilage, 42 



spot of Sommering. 588 

 Young-Helmholtz theory, 615 



Z. 



Zimmermann, corpuscles of, 38b 

 Zona pellucida 658 



