Blood supply to the large intestine

The right-hand side of the large intestine receives its blood from the branches of the superior mesenteric artery, and the left-hand side and lower portions receive blood from the inferior mesenteric artery. Venous blood from the large bowel is drained mainly through the superior and inferior mesenteric veins.

The rectum and anal canal receive arterial blood from the haemorrhoidal artery, which branches from the inferior mesenteric artery. The rectum also receives arterial blood from branches of the hypogastric artery.

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