INTESTINES AND MESENTAET. 



303 



than the preceding in England, and is a very seriouS malady; 

 but I do not consider it necessary to describe it here. 



THE INTESTINES AND MESENTAET. 



1. The duodenum. 



5. The jejnnnm. 



3. The ileum. 



4. The coecnm, being the anterior prolongation of the colon, or first large intes- 



tine. The ileum opens into this (on the back side as presented in the cut,) 

 about twelve inches from its extremity — the opening being defended by a 

 valve. 



6. The large anterior portion of the colon, retaining its size (about three times 



that of the smaller intestines) for about two feet. 



6, 6. The colon tending toward the center. 



7, 1. The returning convolutions of the colon. 



8, The rectum or straight gut, communicating with the anus. 



9, 9. The mesentary, or that portion of the peritoneum wliich retains the intes- 



tines in their places. 

 10. The portion of the mesentary supporting the colon, &c. 

 The united length of these intestines is upward of sixty feet. 



