486 



THE DIGESTIVE APPARATUS IN MAMMALIA. 



The total length of the Rabbit's intestines is ueaily twenty feet, of which the small intestine 

 takes about ten feet. 



2. The Intestines of Ruminants (Figs. 287, 288). 



The small intestine of the Ox floats at the extremity of a broad mesenteric layer, which is 

 narrower in front than behind, plane throughout, except at its intestinal border, which is of 

 considerable length, and is folded into a multitude of festoons. Twice the length of the small 

 intestine of the Horse— averaging about 49 yards— it is about one-half its diameter. The 



Fig. 286. 



INTESTINES OF THE RABBIT (GENERAL VIEW). 



P, Liver; E, stomach. 1, Duodenum; 2, 2', jejunum; 3, ilium ; 4, 4', 4", cecum; 5, point of tha 

 caecum (pushed to the right); 6, first portion of the colon; 6', second portion of the colon. 



duodenum, at first sustained by the omentum, which attaches the small curvature of the fourth 

 compartment of the stomach to the posterior fissure of the liver, form^ a particular loop, which 

 is in contact with the sublumbar region before it goes to be suspended by the large mesentery, 

 and to be continued by the convolutions of the fl.oating portion. The ileum terminates as in 

 the Horse. The Peyerian glands are less numerous on the internal surface of the small 

 intestine than in Solipeds, though they are larger in size. In the Sheep and Goat, they 

 are often more than eight inches in length, and extend to Bauhin's (ileo-oaecal) valve. 



The cmcum is nearly cylindrical in foru), witiiout bulgiugs or longitudinal bands. The 



