Anatomy

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Author:
Jwannn
ID:
238155
Filename:
Anatomy
Updated:
2013-10-05 15:51:23
Tags:
Bones
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Description:
Types/Function of Bones
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    • Macrostructure of Bones
    • Periosteum
    • Diaphysis
    • Epiphyseal Plate
    • Epiphysis
    • Endosteum
    • Medullary Canal
  1. Periosteum
    The covering of the bone and where the blood is supplied.
  2. Diaphysis
    The shaft of the bone.
  3. Epiphyseal Plate
    The growth plates (right above and below the diaphysis).
  4. Endosteum
    The covering on the inside of the bone (lining the medullary cavity). It restructures the bone and blood cells are made there.
  5. Medullary Canal
    Marrow cavity of the bone. Middle of the shaft where bone marrow is produced.
  6. Osteoblasts
    Bone formation
  7. Osteoclasts
    Breakdown of bone
  8. Osteoprogenitor Cells
    Undifferentiated cells in which the osteoblasts are derived.
  9. Cortical Bone
    • 80% of the skeleton
    • Haversian Canals
    • Outer layer of th ebone
    • Slower turnover rate (takes time to build up)
  10. Cancellous Bone (spongy)
    • Higher turnover rate
    • Inside layer of bone
    • Scaffolding of the bone
    • Elastic
  11. Wolf's Law
    Bone remodel in response to mechanical stress
  12. Piezoelectric Effects (example of Wolf's Law)
    • It is the generation of electricity through mechanical stresses.
    • Compression of the bone (electronegative): stimulates Osteoblasts
    • Tension (electropositive): stimulates Osteoclasts
  13. Osseous Tissue
    • Periosteum
    • Endosteum
    • Cortex: (the outer shell...of what?)
    • Medullary Cavity
  14. Blood Supply
    • 5-10% of cardiac output to the skeletal system
    • Nutrient Artery System: branches from major arteries and enters through diaphyseal cortex
    • Periosteal System: supplies out 1/3 of cortical bone
  15. I
    II
    III
    IV
    V
    • 5 basic types:
    • Long
    • Short
    • Flat
    • Irregular
    • Sesamoid: develop in tendons or ligaments. Helps to move the muscles and joints

    Sutural Bones: in joint between skull bones

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