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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 splenic artery supplies the spleen and substantial portions of the stomach and pancreas. The splenic artery courses superior and anterior to the splenic vein, along the superior edge of the pancreas.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.