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Bone Anatomy (Long Bone Structure (Periosteum (2 layers (outer fibrous…

- - - - outer fibrous layer = connective tissues, nerves, blood vessels
      - inner layer = elastic fibers, blood vessels, osteoclasts/blasts
- - - - cellular invasion
- - - - Central Haversian Canal
        
        longitudinally through bone
      - Lammellae
        
        concentric rings of collagen = strength
      - small spaces between lamellae
        
        lacunae
        
        contains osteocytes
- - - - osteoclasts bind to podosomes on on bone surface
        
        send out enzymes and acids that digest collagen
      - Osteoclasts remove collagen and calcium = resorption vacuole
      - New bone cell formation
        
        Osteoblasts make new bone cells