Bursa (anatomy)
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A bursa (plural bursae or bursas; Latin: Bursa synovialis) is a small fluid-filled sac made of white fibrous tissue and lined with synovial membrane. It provides a cushion between bones and tendons and/or muscles around a joint; bursae are filled with synovial fluid and are found around almost every major joint of the body; when they become inflamed, the condition is called bursitis. Bursa is Latin for purse, which is what a bursa resembles.
Infection or irritation of a bursa leads to bursitis (inflammation of a bursa). The general term for disease of bursae is "bursopathy". But basically, current medical studies have no specific knowledge of the entire bursae system.
- Bursa of Fabricius (a lymphatic organ in birds)
- Bursectomy
- Bursa of the knee joint