On the basis of the nature of the matrix present, bones are classified into two types:
They are spongy bone and compact bone.
Compact bone or Dense bone or Periosteal bone:
They are spongy bone and compact bone.
Compact bone or Dense bone or Periosteal bone:
- in compact bone the matrix contains no air spaces
- It is found in the shaft of long bones.
- It is found at the ends of long bones, and in the inner parts of round and irregular bones.
- Compact Bone vs Spongy Bone
![Compact bone vs Spongy bone Compact bone vs Spongy bone](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjN2D5gV5TPvqYIUapJQuPO3FMo94jws17jeUau3PjsMCINFgMDizMN97v7f2BH9Qo02o3g1GkurOEbYLWkfRjaiqDMbuWFrqaGPJUF3CHGvdZNJARQNOS0yBklkAjqTVS-A1ZLerxT7BU/s1600/Compact+bone+vs+Spongy+bone.png)
Compact
bone
|
Spongy
bone
|
Lamellae arranged in regular
Haversian systems with canaliculi and Volkman's canal are present.
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Lamellae arranged as interlacing network. Haversian systems are absent in the spongy bone
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No gaps between lamellae hence compact bone
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Small spaces occur between lamellae, hence spongy bone.
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It is found in the shaft (diaphysis) of long bones
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Forms epiphyses of long bones, besides forming skull bones, vertebrae
and ribs
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Presence of marrow cavity
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Marrow cavity lacking
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Marrow stores fat
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Marrow produces red corpuscles and granular white corpuscles.
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