synovial bursa

A synovial bursa is a small, thin-walled sac found in the mammalian body, typically near large joints. These bursae are lined with synovial membrane, which secretes synovial fluid. This fluid acts as a lubricant and nutrient for surrounding tissues, reducing friction between structures like tendons, muscles, and bones that glide over each other during movement.123

Synovial bursae are a type of bursa, which are generally located at points of friction or stress within the body. Inflammation of a bursa is known as bursitis, and it can cause pain, swelling, and limited joint movement. Bursitis is often caused by local mechanical irritation, but can also be associated with conditions like rheumatoid arthritis or gout.145