The Thin Layer of Cells That Lines the Marrow Cavities

Question

The thin layer of cells that lines the marrow cavities is called the _______.
A) epiphysis
B) diaphysis
C) endosteum
D) periosteum

Accepted Answer

The thin layer of cells that lines the marrow cavities is called the endosteum. The periosteum is a connective tissue covering the outer surface of bone, while the epiphysis and diaphysis refer to specific regions of a long bone.