synovial fluid BTO:0001339 CALOHA:TS-0996 ENVO:02000039 FMA:12277 GAID:265 It provides nutrients and lubrication for articular cartilage Joint fluid is a transudate of plasma that is actively secreted by synovial cells. MA:0002544 MESH:D013582 NCIT:C33718 Portion of organism substance that is a clear fluid that occupies the space in synovial joints.[TAO] TAO:0005154 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 UBERON:0001090 UMLS:C0039097 ZFA:0005154 galen:SynovialFluid joint fluid uberon transudate secretion of serous gland