The normal knee joint is surrounded by a membrane (the synovium) which produces a small amount of thick fluid (synovial fluid). The synovial fluid helps to nourish the cartilage and keep it slippery. The synovium also has a tough outer layer (the joint capsule) which protects and supports the joint.
The Cause of Knee Pain: Step-By-Step
By Carol & Richard Eustice, About.com Guide
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
Step 2 of 5 - Synovial Fluid (Normal Knee Joint)
Cut-section view of normal knee joint
Photo © ADAMPrev
- Step 1 of 5 - Normal Joint (Knee)
- Step 2 of 5 - Synovial Fluid (Normal Knee Joint)
- Step 3 of 5 - Inflamed Synovium (Rheumatoid Arthritis)
- Step 4 of 5 - Joint Damage (Osteoarthritis of Knee)
- Step 5 of 5 - Where Exactly Does It Hurt?
Related Resources - Knee Pain Causes
Related Resources - Knee Pain Causes
Related Resources - Knee Pain Causes
Carol & Richard Eustice
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