INDEX. 



387 



Vaso-motor action, compensatory in loss 

 and increase of blood, 

 362 



,, summary of, 350 



,, centre, 342-349 



limits of, 346 

 ,, ,, relations of, to other 



centres, 346 

 fibres, constrictor, 328-330, 



335 

 ,, ,, ,, course of, 335, 



341, 350 

 ,, ,, loss of medulla 



in, 336, 351 

 ,, tonic action of, 



338-346, 350 



,, chief parts of body 



supplied by, 341 

 ,, dilator, 331 



course of, 337, 338 



,, ,, ,, usually employed in 



reflex action, 340 

 ,, ,, ,, retention of medulla 



in, 351 



functions of the central ner- 



vous system, 340 

 nerves of veins, 353 



Veins, structure of, 198 

 minute, 199 

 valves of, 199, 221 

 their capacity as compared with 



arteries, 202 

 walls of, 202 



blood pressure in, 205, 209 

 vaso-motor nerves of, 353 

 Velocity of nervous impulse, 76 

 of muscular contraction, 89 

 ,, comparative, of arterial, venous 

 and capillary circulation, 211 

 -222 



of arterial current, 222 

 ,, of flow in capillaries, 225 

 ,, ,, in veins, 226 



,, of blood current, 279 



Velocity of pulse-wave, 279 

 Venous circulation, aids to, 221 



pulse, 287 

 Ventricle of heart of frog, its action in 



heart beat, 279-301 

 ,, of tortoise, isolated, spon- 



taneous heart beat of, 

 301, 302, 305 

 Ventricles of the heart, synchronism of 



their action, 232 

 ,, their change of form in 



cardiac cycle, 235 

 Vibrations of muscle sound, 142 

 Vierordt, his hsematachometer, 223 

 Vieussens, annulus of, 308, 314-317 

 Volkmann, his hoemadromometer, 222 

 Voluntary movements, their tetanic 

 character, 142 



Waste matters, their discharge from the 



body, 2 



,, ,, given out by amoeba, 4 



not necessarily useless, 



43 



,, nitrogenous, 104 

 ,, ,, not increased by muscle 



contraction, 105, 108 

 Wave, dicrotic, origin of, 282-287 

 ,, predicrotic, 286 

 ,, anacrotic, 287 

 Waves of contraction, muscular, 88 



,, of nerve and muscle impulse, 127 

 Web of frog, arterial changes visible in, 



324 



Work, mechanical, in living body, 2 

 ,, done by a muscle nerve prepara- 

 tion, 138 et supra 

 ,, amount of, done by heart, 267 



Xanthoproteic test for proteid, 17, 18 



Yellow elastic fibres, 192 



Zone, peripheral, in capillaries, 356 



