What is the primary purpose of using a bursa in the body?

The primary purpose of a bursa in the body is to reduce friction between moving parts, particularly between bones and the surrounding soft tissues such as muscles, tendons, and skin. Bursae are small, fluid-filled sacs that serve as cushions, allowing smooth movement in joints. These structures help to facilitate movement and prevent wear and tear on adjacent structures, which is crucial in maintaining joint health and function. As joints move, especially during activities that involve repetitive motions, the bursa ensures that there is less friction, potentially reducing the risk of inflammation or injury. The lubrication provided by the synovial fluid within the bursa plays a vital role in achieving this frictionless movement.