The superior mesenteric vein is a major blood vessel responsible for draining the small intestine, pancreas, and colon. It is also known as the vena mesenterica superior or the ileocolic vein. Other synonyms for the superior mesenteric vein include the jejunal vein, the ileal vein, and the right colic vein. These veins serve to transport deoxygenated blood from the digestive system to the liver for processing. The superior mesenteric vein is an important component of the circulatory system and plays a vital role in maintaining overall health and wellbeing.