Final answer:
Intraperitoneal structures, such as portions of the large intestine and liver, are attached to the abdominal wall. These structures are held in place by the visceral peritoneum, which includes folds that envelope the organs and contain blood vessels, lymphatic vessels, and nerves.
Step-by-step explanation:
The visceral peritoneum includes multiple large folds that envelope various abdominal organs, holding them to the dorsal surface of the body wall. Within these folds are blood vessels, lymphatic vessels, and nerves that innervate the organs with which they are in contact, supplying their adjacent organs.
For example, the peritoneum attaches two portions of the large intestine, the transverse and sigmoid colon, to the posterior abdominal wall. It also anchors the liver to the anterior abdominal wall and the inferior border of the diaphragm.
This attachment of intraperitoneal structures to the abdominal wall helps to provide support and maintain the position of the organs within the abdominal cavity.