What type of membrane lines joint cavities?

The synovial membrane is specifically designed to line joint cavities, providing a critical function in maintaining joint health and function. This membrane secretes synovial fluid, which provides lubrication, reducing friction between the articulating surfaces of bones within the joints. Additionally, the synovial fluid nourishes the cartilage and helps absorb shock during movement, contributing to the overall stability and mobility of the joints.

The other types of membranes serve different purposes: mucous membranes line body cavities that open to the exterior and are involved in secretion and absorption; serous membranes cover organs and line cavities that are not open to the outside, facilitating smooth movement of organs; and cutaneous membranes form the skin, serving as a barrier and protective layer for the body. Each of these membranes has distinctive functions, but it is the synovial membrane that plays a pivotal role in joint cavities.