Components of compact bone tissue
Compact bone tissue consists of osteons that are aligned parallel to the long axis of the bone and the Haversian canal that contains the bone's blood vessels and nerve fibers. The inner layer of bones consists of spongy bone tissue. The small dark ovals in the osteon represent the living osteocytes.
Source
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"OpenStax College, Bone. October 17, 2013."
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OpenStax CNX
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