DIGESTIVE SYSTEM 



71 



Intestine 



The capacity of the intestine is relatively less than the intestine 

 of herbiverous animals. 



Small intestine. — The small intestine is about 60 feet in length 

 in mature swine. The mesentery of the small intestine varies from 

 2 inches in length in the first portion (duodenum) to 7 or 8 inches 

 long in the latter portion (ileum). The bile duct opens about 2 

 inches from the pyloric opening and the pancreatic duet about 5 

 inches beyond it. Band-like masses of lymphoid tissue composing 

 Peyer's patches and solitary follicles are usually prominent and 



Mesentery 



Fig. 18. Exenterated stomach, intestine and spleen of swine. (Ostertag). 



easily observed, beginning about 20 inches beyond the pylorus and 

 continuing into the cecum. The small intestine is divided for descrip- 

 tion into three parts designated from the stomach backward: duo- 

 denum, jejunum and ileum. 



Large intestine. — The large intestine of a matvxre hog is about 



