Which of the following describes infraperitoneal organs?

Infraperitoneal organs are defined as those organs that are located below the peritoneal cavity. They are uniquely characterized by being covered only on their superior border by the peritoneum, allowing the remainder of their surfaces to be exposed to the surrounding structures. This partial covering differentiates them from completely intraperitoneal organs, which are surrounded entirely by the peritoneum.

Understanding this definition helps to clarify their anatomical relationships and clinical relevance. For instance, common examples of infraperitoneal organs include the bladder and parts of the reproductive organs, which sit below the peritoneal cavity and are involved in various bodily functions.

This is in contrast to other types of organs described in the other options. Organs completely surrounded by peritoneum would be considered intraperitoneal, while organs located behind the peritoneum are referred to as retroperitoneal. The latter option describes organs like the kidneys and pancreas that are situated behind the peritoneal cavity rather than under it. As a result, the classification of infraperitoneal organs reflects their specific orientation and relationship within the abdominal cavity.