A&P

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Author:
lilsarah
ID:
38813
Filename:
A&P
Updated:
2010-09-30 20:37:29
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Description:
Bones and skeletal tissue
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  1. Skeletal cartilage
    • no blood vessels or nerves
    • Dense connective tissue girdle of perichondrium
    • contains blood vessels for nutrient delivery to cartilage
  2. Skeletal Cartilages
    Hyaline cartilages
    • Provide support, flexibility, and resilience
    • Most abundant type
  3. Skeletal Cartilages
    Elastic cartilages
    • Similar to hyaline cartilages, but contain elastic
    • fibers
  4. Skeletal Cartilages
    Fibrocartilages
    Collagen fibers—have great tensile strength
  5. Growth of Cartilage
    Appositional
    Appositional

    • Cells secrete matrix against
    • the external face of existing cartilage
  6. Growth of Cartilage
    Interstitial
    • Chondrocytes divide and
    • secrete new matrix, expanding cartilage from within
  7. Bones of the Skeleton
    Two main groups, by location
    • Axial skeleton
    • Appendicular skeleton
  8. Classification of Bones by Shape
    • Long bones,
    • Longer than they are wide
    • Short bones,
    • Cube-shaped bones (in wrist and ankle)
    • Sesamoid bones (within tendons, e.g., patella)
    • Flat bones,
    • Thin, flat, slightly curved
    • Irregular bones,
    • Complicated shapes
  9. Functions of Bones
    • 1. Support
    • For the body and soft organs
    • 2. Protection
    • For brain, spinal cord, and vital organs
    • 3. Movement
    • Levers for muscle action
    • 4. Minerals (calcium and phosphorus) and growth
    • factors
    • 5. Blood cell formation (hematopoiesis) in marrow
    • cavities
    • 6. Triglyceride (energy) storage in bone cavities

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