Definition for Hepatic vein
From Biology Forums Dictionary
In human anatomy, the hepatic veins are the blood vessels that drain de-oxygenated blood from the liver and blood cleaned by the liver (from the stomach, pancreas, small intestine and colon) into the inferior vena cava.
They arise from the substance of the liver, more specifically the central vein of the liver lobule. None of the hepatic veins has valves.