are osteoblasts cuboidal
osteoblasts large, granular cells, can't undergo mitosis, found on surface of bone form bone, secrete the osteoid: collagen, proteoglycans, glycoproteins. Osteoblast are cuboidal mononuclear bone cells 15-30 Âµm in length, which form a contiguous monolayer over the surface of bone. They are derived from marrow stromal cells by differentiation of pre-osteoblasts and not themselves undergo mitosis.