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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.
(Figure 5-22). The superior mesenteric artery and itsbranches supply blood to the pancreas, small intes-tine, and colon. The inferior mesenteric artery andits branches supply blood to the descending colonand rectum. Paired branches of the visceral abdomi-nal aorta supply blood to the kidneys, adrenal gland,and gonads.