Answer:
In the cavities of synovial joints synovial fluid is present.
Synovial Joints
The most common type of joint is the synovial joint, which allows us to perform a wide variety of motions such as walking, running, typing, and more. Synovial joints are flexible, movable, rotatable, and can slide over one another. These joints can be found in our shoulder, neck, knee, and wrist joints.