Porta hepatis is the name given to the hilum of the liver. It is found on the posteroinferior surface and lies between the caudate and quadrate lobes. The upper part of the free edge of the lesser omentum is attached to its margins.
Within the porta hepatis lie the right and left hepatic ducts, the right and left branches of the hepatic artery, the portal vein and the sympathetic and parasympathetic fibers. Thus it serves as the point of entry into and exit from the liver. A few hepatic lymph nodes may also lie here.