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Periosteum is the thin yet tough outermost layer of bones. Its many collagen fibers support the bone and firmly connect it to the surrounding structures. Osteogenic cells in the periosteum play a vital role in the growth and repair of bony tissue.hysiology. The fibrous layer of the periosteum plays a vital role in connecting bones to the rest of the body. The collagen fibers of the periosteum not only wrap the entire bone, but also merge with the collagen fibers of the ligaments, joint capsules, and tendons that connect to the bone.
Etymology: Gk, peri + osteon, bone. a thick, fibrous vascular membrane covering the bones, except at their extremities. It consists of an outer layer of collagenous tissue containing a few fat cells and an inner layer of fine elastic fibers.Periosteum is permeated with the nerves and blood vessels that innervate and nourish underlying bone. specialized connective tissue covering all bones of the body, and possessing bone-forming potentialities. It is made up of an outer tough fibrous layer and a deeper more succulent osteogenic layer. Periosteum also serves as a point of attachment for certain muscles, tendons and ligaments.