Final answer:
The stomach and duodenum are suspended by the lesser omentum, which connects them to the liver via the falciform ligament and also serves as a conduit for important ducts.
Step-by-step explanation:
The stomach and duodenum are suspended by the lesser omentum from the ventral wall of the abdominal cavity. The lesser omentum connects them to the liver. This structure is of considerable interest not just for its role in suspension but also as a pathway for important structures such as the bile duct and the main pancreatic duct that join at the hepatopancreatic ampulla (ampulla of Vater).
The liver is connected to the abdominal wall and diaphragm by the falciform ligament, while the lesser omentum, which is another important peritoneal fold, tethers the liver to the lesser curvature of the stomach. Not only does the lesser omentum support these organs, it also houses vessels and nerves that supply them, and thus is pivotal in the physiological connectivity of the digestive system.