Porta Hepatis or Hilum of Liver/ Transverse Fissure of Liver
Porta hepatis centrally placed groove which anatomically separates caudate and quadrate lobes. The porta hepatis is a deep fissure in the inferior surface or visceral surface of liver. The porta hepatis on the visceral surface of the right lobe of liver is where major vessels, ducts and nerve enter or leave the liver (except hepatic veins). It situated between caudate lobe posteriorly and quadrate lobe anteriorly.
Enter porta hepatis - Portal vein, hepatic artery, hepatic plexus of nerve.
Leave porta hepatis - Right and left hepatic duct, lymphatic vessel.
Porta hepatitis separates the quadrate lobe in front from the caudate lobe. It lies between caudate lobe (above) and quadrate lobe (below).
The gallbladder lies in a shallow fossa placed on the visceral surface of right lobe of Liver.
Porta hepatis also transmits nerves and lymphatics-
1. Sympathetic nerves - It provide afferent pain impulses from the liver and gall bladder to the brain.
2. Hepatic branch of the vagus nerve (Cranial nerve; X).
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