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The blood supply to the colon comes from the superior and inferior mesenteric arteries. Part of the rectum is supplied by the internal iliac system and this anastamoses with the lower branches of the inferior mesenteric system.
The inferior mesenteric artery is responsible for supplying blood to the left third of the transverse colon and to the sigmoid colon. More distally the rectal arteries supply this portion of the intestines with blood.he blood supply of the intestines. Quiz. The intestines are mainly supplied by the three unpaired branches of the abdominal aortas: 1  Coeliac artery. 2  Superior mesenteric artery.