Medically reviewed by Cara Beth Lee, MDYour knee may keep popping, clicking, crunching, or grinding due to harmless causes, ...

View Full Profile. Learn about our Editorial Policies. “The cavity in between the two knuckles is filled with a fluid that is called the synovial fluid, and when you suddenly change the pressure in ...

Synovial joints have synovial fluid in the joint cavity that lubricates or 'oils' the joint so it moves smoothly. Synovial fluid is made by the synovial membrane. In synovial joints, the ends of ...

Synovial joints have synovial fluid in the joint cavity that lubricates or 'oils' the joint so it moves smoothly. Synovial fluid is made by the synovial membrane. In synovial joints, the ends of ...