Endochondral ossification
The development of the primary and secondary ossification centers.
This is a drawing that show the development of the primary and secondary ossification centers. The first image is hyaline cartilage that is the basis for primary ossification, identified in the next image and represented by a small bone. During secondary ossification, blood vessels and nerves emerge and the bone gets larger.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Primary and secondary ossification."
http://upload.wikimedia.org/wikipedia/commons/c/cf/Bone_growth.png
Wikimedia
Public domain.
