Haversian canal
The Haversian canals surround blood vessels and nerve cells throughout the bone.
This is an exploded view of a Haversian canal. The Haversian canals surround blood vessels and nerve cells throughout the bone.
Source
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"Illu compact spongy bone."
http://en.wikipedia.org/wiki/File:Illu_compact_spongy_bone.jpg
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