In an Adult, Where Can Red Bone Marrow Be Found

Question

In an adult, where can red bone marrow be found?
A) The medullary cavity of long bones only
B) The pelvis only
C) All bones
D) The ends of long bones and in flat, irregular bones

Accepted Answer

Red bone marrow can be found in the ends of long bones and in flat, irregular bones in adults. This is where blood cells are produced. The medullary cavity of long bones is usually filled with yellow bone marrow, which stores fat. The pelvis is a common location for red bone marrow, but it is not the only location. Therefore, the correct option is D.