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*There are three layers in the interzone; a middle layer of low density with regions of high density either side.  
 
*There are three layers in the interzone; a middle layer of low density with regions of high density either side.  
 
**The high density regions form cartilage.
 
**The high density regions form cartilage.
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<big><center>[[Developmental Biology - Anatomy & Physiology|'''BACK TO DEVELOPMENTAL BIOLOGY]]</center></big>
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