The Spaces in Spongy Bone of an Adult's Proximal Epiphyses

Question

The spaces in spongy bone of an adult's proximal epiphyses of humerus and femur are filled with
A)yellow bone marrow.
B)red bone marrow.
C)compact bone.
D)hyaline cartilage.

Accepted Answer

The spaces in spongy bone of an adult's proximal epiphyses of humerus and femur are filled with red bone marrow, which is responsible for producing blood cells. Yellow bone marrow, which stores fat, is found in the medullary cavity of long bones. Compact bone and hyaline cartilage do not fill the spaces in spongy bone.