The pericardial cavity houses the heart which you examined last week. The posterior pleuroperitoneal, visceral or abdominal cavity, which houses liver, esophagus, and gonads. Inside is the gut and internal organs which are lined by visceral peritoneum and hung by mesenteries. Esophagus extends from the mouth at the transverse septum and is lined with papillae called rugae which form a tight seal to keep water out. Cut into the esophagus to see the rugae and anterior spinctor.
Pyloric limb ends in a constricted pyloric spinctor.
Small intestine, composed of, anteriorly, a duodenum, and posteriorly, an ileum, which contains a spiral valve. Cut into the ilium to see the valve which increases the surface area. Large intestine or colon, a shorter section than the small intestine with a rectal gland entering it. The rectal gland is for salt excretion. Rectum, the most posterior portion, which ends in the anus which projects into the cloaca, a common opening with the uro-genital ducts.