What is a mature bone cell

There are four types of cells in bone—osteocytes, osteoclasts, osteoblasts and osteoprogenitor cells. However, in different locations in bones, these cell types have different functions. Osteoblast, which is found in the growing portions of bone, including endosteum and periosteum, is responsible for forming new bone. These cells do not divide, synthesize and secrete the collagen matrix and calcium salts. With the secreted matrix surrounding the osteoblast calcifies, osteoblast becomes trapped within it. And then, its structure changes, becoming an osteocyte, which is the primary cell of mature bone and the most common type of bone cell. With the help of secretion of enzymes, osteocytes can maintain the mineral concentration of the matrix.