598 



INDEX. 



Urea, amount of, in the blood, 51 

 in the urine, 335 

 antecedents of, '■>"■'■> 

 elimination of, 252 

 estimation of, .~>4!l 

 formation of, after removal of the liver, 337 



in the liver, 331 

 origin of, in the body, 550 



in the liver, 266 

 preparation of, 5 18 

 from proteid, '-V.'u 

 presence of, in sweat, 342 

 properties of, ~>1!' 

 Ureters, movements of, 371, 389 

 Uric acid, formation of, 338 

 in the liver, 322 

 in the spleen, 333 

 molecular structure of, 554 

 occurrence of, 338 

 origin <>t', in birds, 557 



in mammals, 338, 556" 

 preparation of, 555 

 properties of, 555 

 Urinary bladder, innervation of, 392 

 movements of, 390 

 pigments, origin of, from haemoglobin, 45 

 secretion, normal stimulus for, 255 



relation of, to the blood-flow through the 

 kidney, 253 

 Urine, acidity of, after meals, 290 

 composition of, 250, 334 



ethereal sulphates of, 572 



secretion of, 251 

 Uriniferons tubules, secretory function of, 252 



structure of, 250 

 Urobilin, 574 



VAGUS, anabolic action of, on the heart, 166 

 anatomy of, in the dog, 159 

 cardiac branches of, 159 

 effect on the heart, nature of, 166 

 gastric branches of, 381 

 inhibition, dependence of, on the character 



of the stimulus, 165 

 intestinal branches of, 385 

 nerves, pulmonary branches of, 465 

 relation of, to apnoea, 442 

 respiratory function of, 459 

 pneumonia. 4<ii> 

 secretory fibres of, to the pancreas, 232 



to the stomach, 239 

 stimulation, auricular effects of, 164 

 effect of, on the heart, 152, 163 

 on the ventricle, 162 

 latent period of, 162 

 Valsalva's experiment, 452 



sinuses, 111 

 Valves, auriculo-ventricular, 108 

 of lymphatic vessels, 146 

 semilunar, 110 

 Valvules conniventes, value of, in absorption, 



314 

 Vaseline, 531 



Vasoconstrictor centre, rhythmical activity of, 

 201, 151 

 nerves, discovery of, 193 

 Vaso dilator nerves, discovery of, 194 

 Vaso-motor centre, medullary, 198 

 cent res. spinal. 199 



sympathetic, 200 



nerves, anatomy of, 198 



methods of investigating, 195 



of the brain, 203 



of the generative organs, 208 



of the head. 204 



of Che heart. 206 



of the intestines, 206 



Vaso-motor nerves of the kidney, 207, 256 

 of the limbs, 209 

 of the liver, 206 

 of the lungs, 205, 466 

 of the muscles, 210 

 of the pancreas, 207 

 of the portal system, 209 

 of the salivary glands, 222 

 of the spleen, 2<>7 

 of the tongue. 205 

 of the veins, 195 

 special properties of, 197 

 reflexes, 201 

 through the vagi, 172 

 Vegetable foods, composition of, 278 



proteids, 577 

 Veins, effeel of compression of, on lymph forma- 

 tion. 72 

 entrance of air into, 97 

 rate of How in, 101 

 vaso-motor nerves of, 209 

 Velocity of blood-flow, 99, 100, 101 

 Vense Thebesii, 1S4 

 Veno-motor nerves of the limbs, 209 

 Venous blood-How. effect of the auricles on, 137 

 circulation, 95, 96 

 pressure, 91 , 94 

 pulse, respiratory, 96 

 Ventilation, principles of, 439 

 Ventricles, independent rhvtbm of, 152 



work done by, 106, 107 

 Ventricular cycle, analysis of, 133 

 diastole, duration of, 123 

 pressure-curves, analysis of, 128 

 pressures, 125 

 systole, duration of, 123 

 Vernix caseosa, 258 

 Vessels of Thebesius, 186 

 Villus, intestinal, structure of, 318 

 Viscero-motor nerves to the intestines, 385 

 Viscosity of irrigating media for the heart, 191 

 Visual purple, 575 

 Vital capacity of the lungs, 427 



force, definition of, 25 

 Vitellin, composition of, 579 

 Voluntary control of the heart, 178 

 Vomiting. 387 

 causes of, 388 

 centre for, 389 

 nervous mechanism of, 388 



Wandering cells, definition of, 48 

 Water, absorption of, 313, 318 



amount lost through the lungs, 410 



distribution of, 503 



effect of, on pancreatic secretion, 236 



elimination of, 340 



imbibition of, 504 



latent beat of, 504 



nutritive value of, 276, 354 



properties of, 503 

 Wharton's duct, 217 

 William's frog-heart apparatus,188 



valve, 187 

 Wines, 535 

 Wirsung's duct, 231 

 Work done by the heart ventricles, 106, 107 



Xanthin, 553 



physiological significance of, 339 

 Xantho-protcid reaction, 576 

 Xylose, 562 



Yawning, 454 



Zymogen granules, definition of, 228 

 of the pancreas, 235 



