Postpharyngeal foregut

The caudal part of the foregut extends to the hepatic bud (cranial intestinal portal); the oesophagus, stomach, liver, biliary ducts, pancreas and the upper half of the duodenum all develop from this structure.
The oesophagus is initially very short. It lengthens considerably with the downward movement of the heart and the development of the lungs. The pericardioperitoneal canals are located on both sides of the oesophagus.

Stomach

The stomach is initially a spindle-shaped extension of the foregut. It is connected to the dorsal body wall by the dorsal mesogastrium (duplicature of the peritoneum), and connected ventrally by the septum transversum. This ventral connection becomes the hepatogastric ligament or lesser omentum due to the liver growing into the septum transversum. The peritoneal sac surrounds the liver from dorsal. Thereby the liver becomes covered with visceral peritoneum. The remaining connection to the ventral abdominal wall forms the falciform ligament of the liver.