What is the role of the articular capsule in the body?

The articular capsule plays a crucial role in the anatomy of synovial joints. It is a structure that surrounds the joint and is comprised of two layers: the outer fibrous layer and the inner synovial membrane. The primary function of the articular capsule is to encapsulate the joint, aiding in the stability and integrity of the joint by holding the bones together. This encapsulation also helps to define the joint space and preserves the relationship between the articulating surfaces of the bones during movement.

Additionally, the inner synovial membrane secretes synovial fluid, which lubricates the joint and provides nutrients to the cartilage, further facilitating smooth movement. The encapsulation provided by the articular capsule ensures that the joint can operate efficiently while being protected from excessive movements that could lead to injuries. Thus, the role of the articular capsule is fundamentally centered around joint stability and function.