| anterior |
|
|
|
|
|
|
|
| 2) At
about 8 weeks |
||||||
| ossification
centers |
||||||
| develop
as mesenchyme |
||||||
| cells become |
||||||
| osteoblasts
which first |
||||||
| secrete
the osteoid, or |
||||||
| organic
component. |
||||||
|
|
|
| Secretion
occurs in spikes |
||
| radiating from
the |
||
| ossification
centers. |
||
