Assertion: rheumatoid arthritis's joint | /r/HasProperty | synovial membrane
Facets:
Source sentences:
text: As the tissue that lines your joints (synovial membrane) becomes inflamed and thickened, fluid builds up and joints erode and degrade.
text: In a healthy joint, the tissue lining the joint (called the synovial membrane or joint synovium) is very thin and produces fluid that lubricates and nourishes joint tissues.