Friday, July 20, 2012


The periosteum is a specialized connective tissue membrane which coats all the bones of the skeleton. It has bone-forming capabilities and serves as an anchoring surface for tendons and muscles. The periosteum is composed of two layers: 1) an outer layer, which is fibrous and contains blood vessels and fibroblasts that produce collagen; 2) an inner layer, called the cambium, which has progenitor cells that transform into osteoblasts, which in turn is responsible for bone formation.