viii CONTENTS. 



SECTION V. 

 THE SECRETION OF PANCREATIC JUICE AND OF BILE. 



PAGE 



252. The secretion of pancreatic juice 432 



252*. The discharge of and the secretion of bile . . . . . 434 

 253. The vascular conditions of the liver and their relations to the 

 secretion of bile. The influence of absorbed products of 



digestion '".'". . . 436 



254. The vaso-motor changes of the alimentary canal in relation to the 



presence of food - . . . 438 



255. The pressure at which bile is secreted . . . -.. ... 439 



256. The resorption of bile ,..',". 439 



SECTION VI. 



THE STRUCTURE OF THE INTESTINES. 



The Small Intestine. 



257. The general plan of structure of the intestine 441 



258. The general structure of the mucous membrane of the small 



intestine 441 



Retiform and adenoid tissue . . . . . . . . 442 



The Villi. The columnar epithelium . . . . . . 445 



The goblet cells of the villi . . . . . . ..-.. 446 



262. The structure of the body of a villus 447 



The crypts or glands of Lieberkuhn 448 



The glands of Brunner 450 



The Large Intestine. 



265. The special features of the large intestine 450 



The structure of the rectum . . . . . . . . 451 



SECTION VII. 

 THE MUSCULAR MECHANISMS OF DIGESTION. 



267. Mastication . . . -> . - : ;'' -* : ! ; -.Iv /'% , '. , . . 452 



Deglutition ; its phases, nature and nervous mechanism . . 452 



The nature of peristaltic movements . ... . 455 



270. The movements of the oesophagus , 457 



271. The movements of the stomach . . . . 458 



272. Vomiting 



273. The movements of the small intestine .... . . 462 



274. The movements of the large intestine .'..-' v ' . ' . . 462 



275. Defalcation - ... 463 



276. The nervous mechanisms of gastric and intestinal movements. The 

 special movements of the rectum .,,,.. . ,* 



277. Influences bearing on peristaltic movements ..... 468 



