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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 [[Bones and Cartilage - Anatomy & Physiology#Cartilage Structure and Function|cartilage]].
 
**The high density regions form [[Bones and Cartilage - Anatomy & Physiology#Cartilage Structure and Function|cartilage]].
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**The middle layer is eliminated by cell death forming the joint space.
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