Xll 



COMPARATIVE PHYSIOLOGY. 



PAGE 



Comparative 298 



Gastric juice .......... 299 



Bile 301 



General ... . 301 



Pigments ........... 302 



Digestive action . . 303 



Comparative . 304 



Pancreatic secretion . 305 



Succus entericus 307 



Comparative 310 



Secretion as a physiological process .311 



Secretion of the salivary glands . . 311 



Secretion by the stomach .315 



The secretion of bile and pancreatic juice . . .316 



The nature of the act of secretion . . .... 318 



Self-digestion of the digestive organs . . 323 



Comparative ..... ... 324 



The alimentary canal of the vertebrate . .... 331 



The movements of the digestive organs . . . 332 



Deglutition ... 333 



Comparative .... . . 336 



The movements of the stomach . . . 336 



Comparative .......... 33'7 



Pathological . . 337 



The intestinal movements . ..... 337 



Defecation ... 338 



Vomiting 339 



Comparative ... 340 



The removal of digestive products from the alimentary canal . 341 



Lymph and chyle ". . . 343 



The movements of the lymph — comparative . . . 344 



Pathological . . ... . . 352 



Fseces . .' 352 



Pathological 353 



The changes produced in the food in the alimentary canal . . 354 



General 354 



Comparative . . .... 357 



Pathological . 359 



Speejal considerations 359 



Various . ». 369 



Evolution . . ... ... 363 



Summary . . . 364 



The Respikatoky System . . 366 



General 366 



