CONTENTS xiii 



SECTION III. (continued) PAce 



Pancreatic juice - - 358 



Bile - ...... 363 



Succus entericus - - 370 



SECTION IV. SECRETION OF THE DIGESTIVE JUICES MICRO- 

 SCOPICAL CHANGES TN THE GLAND CELLS - - 374 

 Changes in pancreas and parotid during secretion - - 375 

 Changes in gastric glands during secretion ... 377 

 Changes in mucous glands during secretion - - 381 

 Mode of formation of the digestive juices - - 383 

 Why are the tissues of digestion not affected by the digestive 

 ferments ? - - 388 



SECTION V. INFLUENCE OF THE NERVOUS SYSTEM ON THE 



DIGESTIVE GLANDS - - 391 



Influence of nervous system on salivary glands - 391 



Influence of nervous system on gastric glands - - 40 



Influence of nervous system on the pancreas - 405 



Secretin - 407 

 Influence of nervous system on secretion of bile -411 

 Influence of nervous system on the secretion of intestinal 



juice - - 41.} 



Secretion of the digestive juices (summary) - - 415 



SECTION VI. SURVEY OF DIGESTION AS A WHOLE - 416 



Reaction of intestinal contents - - . - 419 



Bacterial digestion - - - - 422 



Faeces --....- 423 



CHAPTER VII. 

 ABSORPTION. 



SECTION I: PRELIMINARY PHYSICO-CHEMICAL DATA - - 426 



Imbibition, diffusion, and osmosis - - 426 



Electrolytes - - - - - -428 



Surface tension . - 429 



Adsorption - - 430 



SECTION II. MECHANISM OF ABSORPTION - 431 



Theories of absorption - 433 



Permeability of intestinal epithelium - - 437 



Absorption from the peritoneal cavity - 439 



SECTION III. ABSORPTION OF THE VARIOUS FOOD SUBSTANCES - 441 



Absorption of fat - - 44 1 



Absorption of carbo-hydrates - - 445 



Absorption of water and salts - 446 



Absorption of proteins - - 447 



