EPIPHYSEAL DISK – 7
The upper image shows the transition between the calcified cartilage zone and the ossification zone. The red line indicates the boundary between the both zones.
Above the line see dead calcified cartilage cells. The area below the line is obviously occupied by another tissue: bone that has been deposited over the calcified cartilage septa. Precursors of bone cells accompanied the growth of blood vessels shown in the previous page.
Above the line see dead calcified cartilage cells. The area below the line is obviously occupied by another tissue: bone that has been deposited over the calcified cartilage septa. Precursors of bone cells accompanied the growth of blood vessels shown in the previous page.
Lower image
The upper part of the image has many empty spaces previously occupied by chondrocytes (highlighted in green) and the cartilage extracellular matrix highlighted in light blue.
In the lower part of the image: the walls of cartilage extracellular matrix that surrounded chondrocytes are now covered by a thin layer of bone cells: osteoblasts, osteocytes (highlighted in pink). The newly produced bone matrix is highlighted in a darker tone of blue.
