In the double-layered serous membranes of the anterior body cavity, the inner layer, which covers the surface of each organ, is called the ________ layer.

A) parietal
B) endothelial
C) visceral
D) endosteal
E) retroperitoneal

The inner layer of the double-layered serous membranes of the anterior body cavity, which covers the surface of each organ, is called the visceral layer. The parietal layer lines the cavity walls, and the space between these two layers is filled with serous fluid, which reduces friction as organs move against each other or against the body wall. The other choices, endothelial, endosteal, and retroperitoneal, do not accurately describe the inner layer of the serous membranes.