What is the function of a bursa in joints?

The function of a bursa in joints is to facilitate movement by reducing friction. Bursae are small, fluid-filled sacs located at points of friction between a tendon and bone or between a tendon and other soft tissues. They serve to cushion and protect these structures during movement. By reducing friction, bursae help ensure that the joint can move smoothly and without pain, which is essential for normal joint function.

This role is particularly significant during activities that require repetitive motion or pressure on the joints, as the presence of bursae helps prevent irritation and inflammation in the surrounding tissues. While blood supply, stabilization of joint structure, and storage of synovial fluid are important for joint health and function, they are not the primary roles of the bursa. The primary purpose of the bursa is focused on facilitating smooth and frictionless motion during joint activities.