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A circular structural unit of bone tissue. It consists of a central hole, the Haversian canal through which blood vessels run, surrounded by concentric rings, called lamellae.

The small canals in bone in which the blood-vessels lie.

Canals, nutritive, of Bones.

Canals ramifying in the compact substance of bone and transmitting vessels and lymph to the interior.

Anastomosing canals in bony tissue.