Outline the structure and function of articular cartilage in synovial joints. (3 marks)
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Structure:
- Articular cartilage is a smooth, shiny layer of tissue that covers the ends of bones in synovial joints.
- Thicker in weight-bearing joints like the knee, it lacks blood vessels and receives nourishment from synovial fluid.
Function:
- Articular cartilage acts as a cushion between contacting bone surfaces (joint facets), allowing bones to move freely over each other with minimal friction.
- It absorbs shock and distributes forces across the joint, protecting bones from direct contact and wear during activities.
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Sample Answer
Structure:
- Articular cartilage is a smooth, shiny layer of tissue that covers the ends of bones in synovial joints.
- Thicker in weight-bearing joints like the knee, it lacks blood vessels and receives nourishment from synovial fluid.
Function:
- Articular cartilage acts as a cushion between contacting bone surfaces (joint facets), allowing bones to move freely over each other with minimal friction.
- It absorbs shock and distributes forces across the joint, protecting bones from direct contact and wear during activities.