What is the primary function of a bursa?

• A. To cushion tendons
• B. To produce synovial fluid
• C. To connect bones
• D. Hold synovial fluid

Answer: (D)

Bursae are small, fluid-filled sacs placed where tissues slide against one another, especially around joints. Their main job is to cushion moving parts and reduce friction as tendons, muscles, and skin slide over bones or other structures. The synovial fluid inside a bursa acts as a lubricant, but the purpose of the bursa itself is this cushioning and smooth gliding, not producing the fluid or storing it as a primary function. So the best description is that a bursa’s primary function is to cushion tendons and facilitate painless movement.