Atlas A Human Anatomy Practice Exam 2026 – Complete Study Resource

Intraperitoneal organs are indeed encircled by peritoneum, which is the serous membrane that lines the abdominal cavity and covers the organs within it. This characteristic allows for intraperitoneal organs to have a greater range of motion and allows for the functionality of the abdominal cavity to accommodate movements such as digestion and other activities. The peritoneum helps anchor these organs while also providing space for their expansion and protecting them from friction during bodily movement.

Other types of organs, such as retroperitoneal organs, are located behind the peritoneum and are not surrounded by it; this is contrary to the definition of intraperitoneal organs. Similarly, some organs may be partially covered by peritoneum, indicating they do not fit the description of being completely encased, which applies to intraperitoneal organs. Additionally, organs that lie against the posterior wall of the abdomen are typically classified as retroperitoneal, further distinguishing them from the truly intraperitoneal organs that are fully encircled by peritoneum. This understanding is crucial for studying organ placement and function within the abdominal cavity.