Which of the following describes structures within the abdominal cavity?

• A. Intraperitoneal
• B. Retroperitoneal
• C. Peritoneal and retroperitoneal
• D. Subperitoneal

Answer: (C)

Inside the abdominal cavity, organs are described by their relation to the peritoneum. Some are enveloped by peritoneum and suspended in the cavity (intraperitoneal or peritoneal), while others lie behind the peritoneal lining (retroperitoneal). Since the question refers to structures found within the abdominal cavity, it makes sense to capture both possibilities—peritoneal and retroperitoneal—because the space contains both types of organs. A term like subperitoneal describes organs beneath the peritoneum and is not the broad way we categorize intra-abdominal structures. For context, examples include the stomach, liver, and intestines as intraperitoneal, and the kidneys and much of the pancreas as retroperitoneal.