An out-pocket of thickened ventral foregut epithelium adjacent to the developing heart. Constitutes the first morphological sign of the embryonic liver. The anterior portion of the hepatic diverticulum gives rise to the liver and intrahepatic biliary tree, while the posterior portion forms the gall bladder and extrahepatic bile ducts.

http://upload.wikimedia.org/wikipedia/commons/4/4f/Gray1088.png

The caudal part of the septum transversum is invaded by the hepatic diverticulum which divides within it to form the liver and thus gives rise to the ventral mesentery of the foregut.

liver diverticulum

uberon

diverticulum hepaticum

UBERON:0008835

http://purl.obolibrary.org/obo/uberon.owl, http://purl.obolibrary.org/obo/cl.owl

in mice, the hepatic diverticulum forms by E9 and expands into an obvious liver bud by E10

• liver parenchyma
• ventral pancreatic bud
• liver bud
• bile duct