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Bursae are fluid-filled cavities located at tissue sites where tendons or muscles pass over bony prominences near joints. Their function is to facilitate movement and reduce friction between moving parts. When a bursa becomes infected, traumatized, or injured it is referred to as bursitis.

Review Date: 12/4/2001 12:00:00 AM Reviewed By: A.D.A.M. Medical Illustration Team

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