What do we have in common with fish, besides being vertebrates? The types of joints we (and most vertebrates) share most likely originated from the same common ancestor. But it’s not a feature that we ...

Synovial joints, the lubricated cavity that lets the bones in our shoulders, knees, and elbows slide smoothly against each other, provide freedom of movement to all vertebrates. Scientists have known ...

Doctors use synovial fluid analysis, or synovial joint analysis, to help diagnose the cause of joint pain and to rule out infection. Common causes of joint pain include rheumatoid arthritis (RA), ...