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Osteon development. Blood vessel. Osteoclasts arrive begin dissolving a cone or “tunnel” in the mineralized matrix. Osteon development. Osteoblasts now arrive line the “tunnel” begin adding layers of mineralized matrix. Osteon review. Osteon (haversian system). Osteocytes.

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Osteon development

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Osteon development

Blood vessel

  • Osteoclasts arrive

    • begin dissolving a cone or “tunnel”

    • in the mineralized matrix


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Osteon development

  • Osteoblasts now arrive

    • line the “tunnel”

    • begin adding layers ofmineralized matrix


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Osteon review

Osteon(haversian system)

Osteocytes

(in lacunae)

Lamellae

Central canal

Canaliculi


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Osteon fun facts

  • Around 21 million osteons inadult skeleton

  • Each osteon is 100-400 µmin diameter (1 inch = 25,400 µm)

  • A medium osteon has about30 lamellae (each about 3 µm)

  • The central canal is around50 µm in diameter


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