Question: does articular cartilage secrete synovial fluid?
Answer: The fluid contains hyaluronan secreted by fibroblast-like cells in the synovial membrane, lubricin (proteoglycan 4; PRG4) secreted by the surface chondrocytes of the articular cartilage and interstitial fluid filtered from the blood plasma. ... reduction of friction — synovial fluid lubricates the articulating joints.