The bone collar is a cuff of
periosteal bone that forms around the
diaphysis
The diaphysis is the main or midsection (shaft) of a long bone. It is made up of cortical bone and usually contains bone marrow and adipose tissue (fat).
It is a middle tubular part composed of compact bone which surrounds a central marrow cavit ...
of the
hyaline cartilage model in developing long bones.
[Wheater's Functional Histology, 5th ed. Young, Lowe, Stevens and Heath.] The bone collar appears during
endochondral bone
Endochondral ossification is one of the two essential processes during fetal development of the mammalian skeletal system by which bone tissue is produced. Unlike intramembranous ossification, the other process by which bone tissue is produced, c ...
development to support the growing bone and help it retain its shape.
Skeletal system
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