bone collar bone collar the bone collar is a cuff of periosteal bone that forms around the diaphysis of the hyaline cartilage model in developing long bones. the bone collar appears during endochondral bone development to support the growing bone and help it retain its shape. wheater's functional histology, 5th ed. young, lowe, stevens and heath. this article is issued from wikipedia. the text is licensed under creative commons - attribution - sharealike. additional terms may apply for the media files.