| 11. | Over time, the cartilage is replaced by bone, using endochondral ossification.
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| 12. | The larger part of the scapula undergoes membranous ossification.
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| 13. | Ossification commences in the lower end between 9 and 26 months of age.
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| 14. | The front skeleton shows some exceptional ossifications and fusions.
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| 15. | Most bones have more than one secondary ossification center.
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| 16. | Premature complete ossification of these sutures is called craniosynostosis.
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| 17. | However, these arrangements of people are fluid and ossification creates unnatural hierarchy.
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| 18. | Chondrocytes undergo terminal differentiation when they become hypertrophic, which happens during endochondral ossification.
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| 19. | These fractures occur at tubercles ( bony projections that lack secondary ossification centers ).
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| 20. | Full ossification starts in the late twenties and finishes before the age of 50.
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