What is the fibrous layer of a bone?

The fibrous layer of a bone, also known as the periOSteum, is a dense connective tissue that envelops the outer surface of bones, except at the surfaces of the joints. It serves several key functions, including providing attachment points for muscles and tendons, supplying blood vessels and nerves to the bone, and playing a role in bone growth and repair. The fibrous layer consists of collagen fibers that help anchor it firmly to the underlying bone.