The synovial membrane is a specialized tissue that lines the cavities of synovial joints, such as the knee and elbow. It produces synovial fluid, a thick liquid that lubricates the joint, reducing friction between the cartilage surfaces during movement. This membrane plays a crucial role in maintaining joint health and function. In addition to lubrication, the synovial membrane also helps nourish the cartilage and remove waste products. It consists of two layers: the intima, which is the inner layer that secretes synovial fluid, and the subintima, which contains blood vessels and connective tissue. Proper functioning of the synovial membrane is essential for overall joint mobility and comfort.