Chap. XI] 



THE VASCULAR SYSTEM 



195 



the small intestine beyond the first portion, and half of the large 

 intestine. 



(c) The inferior mesenteric artery arises from the front of the 

 aorta, about an inch and a half (38 mm.) above its bifurcation, 

 and supplies the lower half of the large intestine. Contiiuied 





INFERIOR 

 ^ MESENTERIC 



INFERIO 

 HEMORRHOIDAL 



Fig. 124. — Inferior iSlESENTERic Artery. (Gerrish.) 



under the name of the superior hemorrhoidal artery, it also takes 

 part in the blood supply of the rectum. 



(d) The renal arteries are of large size, in proportion to the bulk 

 of the organs (kidneys) which they supply. They arise from the 

 sides of the aorta, about half an inch (12.5 mm.) below the superior 

 mesenteric artery, that of the right side being generally a little 



