Common Hepatic Artery
Right Hepatic Artery
Left Hepatic Artery
The common hepatic and left gastric arteries create the right and left gastropancreatic folds, respectively. The common hepatic and left gastric arteries lie between the layers of the lesser omentum. The splenic artery runs a tortuous course along the entire superior border of the pancreas. The common hepatic gives rise to the Proper Hepatic and Gastroduodenal arteries. The Right Hepatic artery arises from the proper hepatic artery. It passes behind the common hepatic duct before it enters the liver to supply the parenchyma and stroma. The right hepatic divides into anterior and posterior segmental branches. Many variations exist. The Left Hepatic artery arises from the proper hepatic artery or alternately as a branch of the left gastric artery. The left hepatic divides into lateral and medial segmental branches. Branches arise from the gastroduodenal artery in its course superior, posterior, and inferior to the pyloroduodenal junction.
The Cystic artery arises from the right hepatic artery within the confines of the cystohepatic (Calot) triangle. As its most frequent variation, the cystic artery may arise as a branch of either right hepatic or common hepatic artery from the superior mesenteric artery.