Intramembranous Ossification #1
by Jose Calvo / Science Photo Library
Title
Intramembranous Ossification #1
Artist
Jose Calvo / Science Photo Library
Medium
Photograph - Photograph
Description
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.
Uploaded
May 8th, 2022
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