What does the periosteum contain?

Answer 1

Periosteum is a membrane that lines the outer surface of all bones, except at the joints of long bones.Endosteum lines the inner surface of all bones.

Periosteum consists of dense irregular connective tissue. Periosteum is divided into an outer "fibrous layer" and inner "cambium layer" (or "osteogenic layer"). The fibrous layer contains fibroblasts, while the cambium layer contains progenitor cells that develop into osteoblasts. These osteoblasts are responsible for increasing the width of a long bone and the overall size of the other bone types. After a bone fracture the progenitor cells develop into osteoblasts and chondroblasts, which are essential to the healing process.

Answer 2

Yes. It is a connective tissue membrane that covers the outer surface of a bone. The outer fibrous layer is dense irregular collagenous connective tissue and does contain blood vessels and nerves.

Answer 3

Peri means around and osteum means bone. So periosteum means the structure that surrounds the bone. This fallows that you have endosteum inside the long bones. Also that you have two layers of periosteum for flat bones of the skull bones and no endosteum there. (This layer acts as barrier between the bone and other tissues that is attached to bones.)