The porta hepatis or transverse fissure of the liver is a short but deep fissure, about 5 cm long, extending transversely beneath the left portion of the right lobe of the liver, nearer its posterior surface than its anterior border.

It transmits the following (in anterior to posterior order): The hepatic duct lies in front and to the right, the hepatic artery to the left, and the portal vein behind and between the duct and artery.

The horizontal line between the vertical limbs of the "H" represents the porta hepatis.

The quadrate and caudate lobe lie superior and inferior to this line respectively.

This article incorporates text in the public domain from page 1191 of the 20th edition of Gray's Anatomy (1918)