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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 polar artery usually gives rise to the left gastroepiploic artery, but the latter may also arise from the distal splenic or inferior terminal artery. The left gastroepiploic artery then runs along the greater curvature of the stomach.Numerous short gastric branches arise from the terminal splenic or left gastroepiploic artery to supply the gastric cardia and fundus. The splenic artery has many branches that supply the pancreatic body and tail.The first large branch is the dorsal pancreatic artery, and the second large branch is the greater pancreatic artery (or arteria pancreatica magna), which arises from the middle segment of the splenic artery.he splenic artery has many branches that supply the pancreatic body and tail. The first large branch is the dorsal pancreatic artery, and the second large branch is the greater pancreatic artery (or arteria pancreatica magna), which arises from the middle segment of the splenic artery.