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*****Forms 80% of total bone mass
 
*****Forms 80% of total bone mass
 
*****Consists of cells and interstitial substance - 30% ossein (type of collagen) and 70% minerals, especially calcium phosphate
 
*****Consists of cells and interstitial substance - 30% ossein (type of collagen) and 70% minerals, especially calcium phosphate
*****Forms the shell of long bone shafts - contain '''Haversian systems'''
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*****Forms the shell of long bone shafts - contain [[Haversian systems]]
 
****'''Cancellous bone''' (spongy or trabecular)  
 
****'''Cancellous bone''' (spongy or trabecular)  
 
*****In vertebrae, flat bones and epiphyses of long bones
 
*****In vertebrae, flat bones and epiphyses of long bones
 
*****Contains no Haversian systems
 
*****Contains no Haversian systems
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===Periosteum and blood supply===  
 
===Periosteum and blood supply===  
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