72 



THE HORSE IN HEALTH AND DISEASE 



It has two blind ends, and rcseni})l(-s in form an inverted comma. 

 The larger end is attached under the right kidney, while the free 

 end lies on the abdominal floor, giving the organ a downward and 

 forward direction. The two openings of the cecum are placed close 

 together in its crook. The opening for the exit of food material 

 being higher up than the inlet, insures a thorough mixing. The 



Fig. 19. — Longitudinal section of the small intestine. The submucous 

 coat consists of connective tissue and contains the larger blood-vessels, from 

 which the mucous and muscular coats are supplied with blood. (From Hough 

 and Sedgwick's The Human Mechanism, by permission of Ginn and Company, 

 Publishers.) 



latter opening has a valvular arrangement to prevent regurgita- 

 tion of the ingesta. 



The large colon is a massive viscus, from 10 to 12 feet long, with 

 an average diameter of nearly 10 inches. It commences at the 

 crook of the cecum and runs downward and forward, along the 

 right costal arch to the sternum, where it curves to the left, and is 

 continued backward on the left part of the abdominal floor to the 



