luukalvon
Luukalvo, also known as periosteum, is a dense layer of connective tissue that covers the outer surface of bones, except for the articular surfaces of synovial joints, which are covered by articular cartilage. It is composed of two layers: an outer fibrous layer and an inner cellular layer. The outer layer is rich in collagen fibers and blood vessels, providing structural support and nourishment to the bone. The inner layer, also called the cambium layer, contains osteoprogenitor cells, which are stem cells that can differentiate into osteoblasts, the cells responsible for bone formation.
The periosteum plays several vital roles in bone health. It is essential for bone growth in thickness,