The Probert Encyclopaedia of Medicine

BURSA

In medicine, a bursa is a fiber sac around the joints between some tendons and the bones under them. Bursae are lined with a membrane that releases synovial fluid from the joint spaces, the bursa acts as a small cushion that allows the tendon as it contracts and relaxes to move over the bone. When the membrane becomes swollen or damaged the condition is known as bursitis or popularly rheumatism.
Research Bursa