Question

In bones, a layer of osteoblasts and osteoclasts line the interior of the bone (this cellular layer covers all trabeculae, is adjacent to the medullary cavity and lines the inside of osteons). This layer is called the endosteum. What is its role in bone?

A. The endosteum can add or remove bone from the inside of bones, remodeling them.

B. The endosteum can add or remove cartilage from the inside of bones, replacing bone with cartilage.

C. The endosteum is an epithelial layer that protects the inside of bones and regulates transportation of nutrients to bones.

D. The endosteum has collagen fibers that anchor attaching muscles.