where are osteoblasts osteoclasts from
Osteoblast, large cell responsible for the synthesis and mineralization of bone during both initial bone formation and later bone remodeling. Osteoblasts form a closely packed sheet on the surface of the bone, from which cellular processes extend through the developing bone. They arise from the differentiation of osteogenic cells in the periosteum, the tissue that covers the outer surface of the bone, and in the endosteum of the marrow cavity. This cell differentiation requires a regular supply of blood, without which cartilage-forming chondroblasts, rather than osteoblasts, are formed.
Osteoclasts are found on top of or next to existing bone tissue, sometimes in close proximity to osteoblasts. There is on-going race between the two cell types; osteoblasts make bone tissue while osteoclasts reabsorb it.