INFERIOR MESEXTERIC ARTERY. 



413 



Fig. 286. 



Fig. 286. THE INFERIOR MESENTERIC ARTKRY WITH ITS DISTRIBUTION AKD COMMUNICA- 

 TIONS (from Tiedemann). \ 



The small intestines with the superior mesenteric artery are turned towards the right 

 side, the pancreas is exposed, and the large intestine is sti'etched out : a, b, the duodenum ; 

 c, the commencement of the jejunum; d, the small intestine; e, the ascending colon ; f, 

 the transverse colon ; g, the descending colon ; h, the sigmoid flexure : i, the commence- 

 ment of the rectum ; &, the pancreas ; 1, placed on the trunk of the abdominal aorta at 

 the origin of the renal arteries ; 1', on the same at the origin of the inferior mesenteric ; 

 I' 1 , near the division into common iliac arteries ; 2, inferior mesenteric, giving off first the 

 left colic ; 3, ascending branch of the left colic ; 4, branches to the descending colon ; 5, 

 the sigmoid branch ; 6, the superior haemorrhoidal branch ; 7, the trunk of the superior 

 mesenteric issuing from behind the pancreas ; 8, some of its intestinal branches ; 9, the 

 middle colic artery ; 10, its left branch forming a loop of communication with the left 

 colic ; 11, its right branch; 12, the spermatic arteries. 



IV. CAPSULAR OR SUPRARENAL ARTERIES. 



The suprarenal or capsular arteries are two very small vessels which arise 

 from the aorta on a level with the superior mesenteriu artery, and incline 



