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Ligaments are fibrous connective tissues that connect bone to bone at joints, playing a crucial role in providing stability and support. They help to maintain the integrity of joints by limiting excessive movement and preventing dislocations. Ligaments are generally not elastic, which means they are stronger and more durable than other connective tissues, allowing them to effectively resist tensile forces.

In the context of joint function, ligaments work in conjunction with muscles and tendons to stabilize the joint during movement. Proper ligament function is essential for normal joint biomechanics, and any injury to a ligament can significantly impact joint stability and function.

The other options, while related to joint function, serve different purposes. Cartilage provides cushioning and reduces friction between bones during movement. Bursae are fluid-filled sacs that reduce friction between moving structures, like tendons and bones. Synovial fluid lubricates joints and nourishes cartilage, but does not connect bone to bone. Each of these components plays a vital role, but ligaments are specifically responsible for the connection and stability between bones in a joint.