Joint Notes

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Joint Notes
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Joints

• Articulations of bones
• Functions of joints
• Hold bones together
• Allow for mobility

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Functional Classification

• Classified based on amount of movement
• Synarthroses immovable joints
• Amphiarthroses slightly moveable joints
• Diarthroses freely moveable joints

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Structural Classification

• Classified by type of material joints are made
  of
• Fibrous joints
• Generally immovable
• Cartilaginous joints
• Immovable or slightly moveable
• Synovial joints
• Freely moveable

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Types of Joints

• Fibrous Joints
• Bones united by fibrous tissue
• Examples
• Sutures holds skull
  bones together

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• Syndesmoses
• Ex distal end of tibia
  and fibula

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• Cartilaginous Joints
• Bones connected by cartilage
• Ex
• Pubic symphysis
• Intervertebral joints

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• Synovial fluid is
  found in the joint
  cavity

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Features of Synovial Joints

• Articular cartilage (hyaline cartilage) covers
  the ends of bones
• Joint surfaces are enclosed by a fibrous
  articular capsule
• Have a joint cavity filled with synovial fluid
• Ligaments reinforce the joint

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• Bursae flattened fibrous sacs
• Lined with synovial membranes
• Filled with synovial fluid
• Not actually part of the joint

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