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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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Presentation Transcript
slide1

Osteon development

Blood vessel

  • Osteoclasts arrive
    • begin dissolving a cone or “tunnel”
    • in the mineralized matrix
slide2

Osteon development

  • Osteoblasts now arrive
    • line the “tunnel”
    • begin adding layers ofmineralized matrix
slide3

Osteon review

Osteon(haversian system)

Osteocytes

(in lacunae)

Lamellae

Central canal

Canaliculi

slide4

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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