Joints

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Author:
esellers
ID:
186352
Filename:
Joints
Updated:
2012-11-30 22:47:32
Tags:
Joints Articulations
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Description:
Joints (Articulations)
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  1. Joints (Articulations)
    • Site where two or more bones meet
    • Joint is the weakest part of the skeleton
  2. Funtions of the Joints (2)
    • Gives movement
    • Holds the bones together
  3. How many bones does and embryo have and how many bones does an adult (over 25) have?
    • 350
    • 206
  4. Longest and shorest bones
    • Longest is the femur (thigh)
    • Shortest is the stapes (inner ear)
  5. Two classifications of Joints
    Functional and Structural
  6. Three Fibrous Structural Joints
    • Sutures
    • Syndesmoses
    • Gomphoses
  7. Cartilaginous Joints (2)
    • Synchondroses
    • Symphyses
  8. Synovial Joints
    Joints in which the articulating bones are seperated by a fluid-containing joint cavity
  9. Functional Joints
    Based on the about of movement allowed by joint
  10. Three functional classes of joints
    • Synarthroses
    • Amphiarthroses
    • Diarthroses
  11. Synarthroses
    • Immovable
    • Joint is there but no movement
    • Ex. Skull joint
  12. Amphiarthroses
    • Slightly movable
    • Ex. wrist, ankle
  13. Diarthroses
    • Freely movable, can move all the way around
    • Ex. shoulders
  14. Structural Joints
    • Focuses on the material bidning bones together and whether or not a joint cavity is present
    • Structure between bone material
  15. Three structural classifications
    • Fibrous
    • Carilaginous
    • Synovial
  16. Fibrous
    • Three types:
    • Sutures
    • Syndesmoses
    • Gomphoses
  17. Cartilaginous
    Synchondroses and symphyses
  18. Synovial
    Diathroses- completly moveable joint
  19. Sutures
    • A fibrous structure that occurs between the bones of the skull
    • Interlocking junctions completely filled with connective tissue fibers, NO HOLES
    • Binds bones tightly together but allows room for growth during youth
  20. Synostoses
    When skull bones fuse at middle age
  21. Syndesmoses
    • Bones are connected by a fibrous tissue ligament
    • Partial movement
    • Ex. the connection between the tibia and fibula and the radius and ulna (for hand)
  22. Gomphoses
    • The beg-in-socket fibrous joint between a tooth and its alveloar socket.
    • The fibrous connection is the periodontal ligament
  23. Synchondroses
    • A cartilaginous joint where a bar/plate of hyaline cartilage that unites the bones, tightly packed around.
    • Ex. epiphyseal plates of children and joint between the costal cartialge of the first rib and the sternum
  24. Symphyses
    • A cartilaginous joint.
    • Hyaline cartilage covers the articulating sureface of the bone and is fused to an interventing pad of fibrocartilage.
    • Ex. intervertral joints and the pubic symphysis of the pelvis
  25. Sunovial Joints
    • Those joints in which the articulating bones are separated by a fluid-containing joint cavity
    • freely moveable (Diarthroses)
    • Ex. all libs joints and most joints of the body
  26. Synovial Joints all have the following (5)
    • Articular cartilage
    • Joint cavity
    • Articular capsule
    • Synovial Fluid
    • Reinforcing ligaments
  27. Bursae
    • Ball baring joint to reduce friction
    • Flattened, fibrous sacs lined with synovial membrane containing synovial fluid
  28. Tendon Sheath
    Enlongated bursa that wraps comletely around the tendon

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