Bone Histology

An osteon (haversian system) is the basic structural unit of compact bone. It consists of a Haversian canal, its contents, and associated concentric lamellae and osteocytes. Osteocytes are located in lacunae between lamellar rings, and canaliculi radiate between lacunae across the lamellae. Blood vessels from the periosteum or endosteum enter the bone through perforating Volkman's canals, which usually run perpendicular to the long axis of the bone.


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