From the case:
Occipital bone ossification centres
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The occipital bone has complex development; it ossifies from six different centres. The six centres that are seen in the diagram are:
basioccipital bone
exoccipital bone (two centres)
supraoccipital bone
interparietal bone (two centres)
Case Discussion
Author: Henry Gray
Source URL: https://commons.wikimedia.org/wiki/File:Gray131.png
Modification: Annotations - blue numbers and dashed lines.
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