A Good Description of a Medullary (Marrow) Cavity is That

Question

A good description of a medullary (marrow) cavity is that it
A) is located in spaces between trabeculae
B) allows movement of nutrients between osteocytes
C) is a region of bone that contains yellow bone marrow
D) is a region of bone that contains red bone marrow

Accepted Answer

The medullary (marrow) cavity is a central cavity within bones where yellow bone marrow (mostly fat) is stored. It is not located in spaces between trabeculae (which is characteristic of spongy bone), nor does it primarily allow for the movement of nutrients between osteocytes. While red bone marrow is found within bones, it is primarily located within the trabecular cavities of spongy bone in the epiphyses of long bones, not in the medullary cavity.