Sit on the chair with your feet flat on the floor and wider than shoulder-width apart ... a soft tissue called the synovium (or synovial membrane) and synovial fluid, which is produced by the ...

Four important synovial joints used in most sporting actions are the elbow and shoulder joints in the arm, and the knee and hip joints in the leg. The elbow and knee joints are both hinge joints.

Synovial fluid is made by the synovial membrane. In synovial joints, the ends of the bones are covered with cartilage (called articular cartilage) which cushions the joint and prevents friction ...