Joints -

3 Types
- based on their freedom of movement:
  - (1) synarthroses,
  - (2) amphiarthroses
  - (3) diarthroses
- Synarthroses
  - Example: sutures of skull
  - have motion during early childhood, they usually have no motion at maturity
  - simply serve to join two bony elements.
- Amphiarthroses
  - Example: symphysis pubis
  - have hyaline cartilage and intervening discs
  - Limited motion is possible.
- Diarthroses
  - characterized by hyaline cartilage, synovial membranes, capsules, and ligaments.
  - Types
    - Uniaxial joints
      - Allow movement in one plane
        hinge
        trochoid
    - Biaxial joints
      - Allow movement in two planes.
        condyloid
        ellipsoid
        saddle
    - Polyaxial joints
      - Allow movement in any direction
        ball and socket
    - Plane (gliding) joints
      - Allow only slight sliding of one joint surface over another

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