1.structure of bone

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by Dr Nitin Kaushik Jr Resident

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  • http://www.dml.georgetown.edu/educ/micro/bone/21.htm
  • 1.structure of bone

    1. 2. <ul><li>Dr.Nitin Kaushik </li></ul><ul><li>Junior Resident </li></ul><ul><li>Dept. of Orthopedics </li></ul><ul><li>ESIPGIMSR MGM Hospital </li></ul>
    2. 3. <ul><li>Bone (osseous) Connective Tissue </li></ul><ul><ul><li>Cells </li></ul></ul><ul><ul><ul><li>Osteoprogenitor cells (stem cells) </li></ul></ul></ul><ul><ul><ul><li>Osteoblasts </li></ul></ul></ul><ul><ul><ul><li>Osteocytes (in lacunae) </li></ul></ul></ul><ul><ul><ul><li>Osteoclasts </li></ul></ul></ul><ul><ul><li>Matrix </li></ul></ul>
    3. 4. <ul><ul><li>Matrix: arranged as lamellae </li></ul></ul><ul><ul><ul><li>Collagen fibers </li></ul></ul></ul><ul><ul><ul><li>Calcium phosphate salts (as hydroxyapatite) </li></ul></ul></ul>
    4. 5. <ul><ul><li>Matrix: arranged as lamellae </li></ul></ul>
    5. 6. <ul><li>Arrangements of Bone Tissue </li></ul><ul><ul><li>Compact (cortical) </li></ul></ul><ul><ul><li>Spongy (cancellous) </li></ul></ul>
    6. 7. <ul><li>Compact Bone Tissue </li></ul><ul><ul><li>Location </li></ul></ul><ul><ul><ul><li>On bone surfaces (matrix arranged as circumferential lamellae) </li></ul></ul></ul><ul><ul><ul><li>In shafts of long bones (matrix arranged as concentric </li></ul></ul></ul>
    7. 8. <ul><ul><li>The osteon (Haversian system): </li></ul></ul>
    8. 9. <ul><ul><li>The osteon (Haversian system): unit structure of thick compact bone </li></ul></ul> Haversian canal Lacuna  Canaliculi  <ul><ul><ul><ul><ul><li>* </li></ul></ul></ul></ul></ul>
    9. 10. <ul><li>Arrangements of Bone Tissue </li></ul><ul><ul><li>Compact Bone Tissue </li></ul></ul><ul><ul><li>Spongy (cancellous) bone tissue </li></ul></ul><ul><ul><ul><li>Location: within bones </li></ul></ul></ul><ul><ul><ul><li>Consists of branching plates called trabeculae </li></ul></ul></ul><ul><ul><ul><li>Bone marrow found between the trabecular spaces </li></ul></ul></ul>
    10. 11. <ul><li>Periosteum </li></ul>
    11. 12. <ul><li>Periosteum </li></ul><ul><ul><li>Fibrous layer </li></ul></ul><ul><ul><li>Cellular layer </li></ul></ul>

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