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No change in size ,  09:46, 2 October 2007
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***Fine collagen fibres in concentric or parallel laminae
 
***Fine collagen fibres in concentric or parallel laminae
 
***Two main types:
 
***Two main types:
****'''Compact bone''' (cortical)
+
****'''Compact bone (cortical)'''  
 
*****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]]
 
*****Forms the shell of long bone shafts - contain [[Haversian systems]]
****'''Cancellous bone''' (spongy or trabecular)  
+
****'''Cancellous bone (spongy or trabecular)'''
 
*****Made up of plates, tubes or bars arranged in lines of stress
 
*****Made up of plates, tubes or bars arranged in lines of stress
 
*****In vertebrae, flat bones and epiphyses of long bones
 
*****In vertebrae, flat bones and epiphyses of long bones
Author, Donkey, Bureaucrats, Administrators
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