Joints

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Author:
Brytelot
ID:
9896
Filename:
Joints
Updated:
2010-03-10 14:38:18
Tags:
anatomy physiology joints
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Description:
LIL INFO ON JOINTS
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  1. Articulation
    Articulation—

    site where two or more bones meet
  2. Functions of joints
    Functions of joints:

    Give skeleton mobility

    Hold skeleton together
  3. Functional Classification of Joints

    FUNCTIONAL
    STRUCTURAL
    Three FUNCTIONAL classifications:

    immovable (synarthrosis)

    slightly movable (amphiarthrosis)

    • freely movable (diarthrosis)
    • Three STRUCTURAL classifications:
    • Fibrous (mainly immoveable)
    • Cartilaginous (partially moveable)
    • Synovial (freely moveable)
  4. SUTURE
    Joint held together with very short,interconnecting fibers, and bone edgesinterlock. Found only in the skull.
  5. Syndesmosis
    • Joint held together by a ligament.
    • Fibrous tissue can vary in length, but is longer than in sutures.
  6. Gomphosis
    • “Peg in socket” fibrous joint.
    • Periodontalligament holds tooth in socket.
  7. Cartilaginous Joints
    Two types
    • Synchondroses
    • Bones united by hyaline cartilage

    • Symphyses
    • Bones united by fibrocartilage
  8. Synovial Joints
    • All are freely moveable (diarthrotic)
    • Include all limb joints; most joints of the body
    • All have:
    • --Joint capsule lined with synovial membrane
    • --The synovial membrane produces fluid
    • --Ligaments (inside and outside joint)
  9. Bursae
    Bursae

    --Extra fibrous sacs lined with synovial membranes, and containing synovial fluid

    --Placed where ligaments, muscles, skin, tendons, or bones rub together to reduce friction at joint

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