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****Perichondrium differentiates to osteoblasts
 
****Perichondrium differentiates to osteoblasts
 
***Capillary invasion to central core, forming trabecular bone
 
***Capillary invasion to central core, forming trabecular bone
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*Bone Growth and Remodeling
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**Short bones: endochondral ossification continues in diaphysis until only cartilage rim remains
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**Long bones: secondary center of ossification develops in epiphyses
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***'''Epiphyseal Growth Plate''': transverse disc of cartilate between the two ossification centers, allows longitudinal growth to continue to maturity, then closes
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**'''Primary''' bone has not yet been '''remodelled'''
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***Contains less mineral and more randomly arranged collagen fibers, trabecular organization
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**Remodelling occurs by '''Haversian canals'''
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***Osteoclasts dig out canal, followed by blood vessel invasion
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***Concentric lamellae laid down
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***Phased resorption happens concurrently
    
==Types of Bone==
 
==Types of Bone==
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