Normal·Musculoskeletal·Long bone diaphysis
Compact bone — osteon (Haversian system)
Stain: H&E·Magnification: 40x·Tissue: Lamellar bone·4 labeled regions
Wikimedia Commons · File:Compact bone histology 2014.jpg · https://commons.wikimedia.org/wiki/File:Compact_bone_histology_2014.jpg (CC-licensed)
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Concentric lamellae arranged around a central canal carrying vessels + nerves. The repeating cylindrical unit of compact bone.
Labeled regions (4)
- 1Haversian canal
Central vascular channel of an osteon.
- 2Concentric lamellae
Parallel layers of mineralized matrix; collagen orientation alternates.
- 3Osteocyte in lacuna
Trapped osteoblast; senses mechanical strain.
- 4Volkmann canal
Transverse channel linking adjacent Haversian systems.
