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Endochondral Ossification. Endochondral ossification follows five steps. (a) Mesenchymal cells differentiate into chondrocytes. (b) The cartilage model of the future bony skeleton and the perichondrium form. (c) Capillaries penetrate cartilage. Perichondrium transforms into periosteum. Periosteal collar develops. Primary ossification center develops. (d) Cartilage and chondrocytes continue to grow at ends of the bone. (e) Secondary ossificationcentersdevelop.(f) Cartilage remains at epiphyseal (growth) plate and at joint surface as articular cartilage. English labels. From OpenStax book 'Anatomy and Physiology', fig. 6.17.
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"OpenStax AnatPhys fig.6.17 - Endochrondal Ossification - English labels" by OpenStax, license: CC BY. Source: book 'Anatomy and Physiology', https://openstax.org/details/books/anatomy-and-physiology.
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