Subperitoneal organs are primarily covered on which surface?

Subperitoneal organs are primarily covered on the superior surface by the parietal peritoneum, which is a serous membrane lining the abdominal cavity. This arrangement means that these organs, located below the peritoneum, have a layer of the peritoneum covering their upper aspect, while the remaining surfaces are typically either in contact with visceral organs or are not covered by peritoneum at all.

The correct choice reflects the anatomical relationship of subperitoneal organs within the abdominal cavity, where they are positioned beneath the peritoneal cavity. Understanding this concept is crucial for grasping the organization of abdominal and pelvic organs and their interactions with the peritoneal cavity.