Light micrograph of a flat bone of the skull in the process of direct, or intramembranous, ossification. Immature plexiform, or trabecular, bone tissue has formed directly from the mesenchyme, which is still in a very active phase of osteogenesis, as evidenced by the presence of very numerous osteoblasts in the periosteum. Among the trabeculae of immature bone tissue, there remains a mesenchyme with abundant vessels and osteoprogenitor cells. Unlike chondral ossification, mixed trabeculae with remains of calcified cartilage are not seen, nor is there a clear delimitation of the future cortical bone. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / JOSE CALVO |
Taille de l’image : | 3840 px × 3072 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |