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Osteon Development in Bones

Learn how osteons form in bones, from the arrival of osteoclasts to the addition of mineralized layers by osteoblasts. Discover the structure and function of osteons in the skeletal system. Fun facts included!

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Osteon Development in Bones

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  1. Osteon development Blood vessel • Osteoclasts arrive • begin dissolving a cone or “tunnel” • in the mineralized matrix

  2. Osteon development • Osteoblasts now arrive • line the “tunnel” • begin adding layers ofmineralized matrix

  3. Osteon review Osteon(haversian system) Osteocytes (in lacunae) Lamellae Central canal Canaliculi

  4. 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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