this apparent species difference in incidence of bone marrow osteogenesis may relate to a lower concentration of osteogenic precursor cells in canine marrow , a failure of osteogenic precursor cells to differentiate to osteoblasts in a somewhat artificial environment in vivo ( viz diffusion chambers ) , a lack of cell-matrix interaction to stimulate cell differentiation , inappropriately short diffusion chamber implantation times post grafting , or a difference in ontogenetic stage of development of marrow donors with rabbit cells being physiologically younger .
C1383501
cell-matrix
C0007634
cells