Why sternoclavicular joint is a synovial joint?
Synovial joints allow for movement between the articulating bones (in this case the sternum and the clavicle). The articulating bones are covered in articular cartilage, which are connected with ligaments and lined with a synovial membrane. There is a fluid-filled sac between these types of joints to reduce the amount of friction with movement and the fluid inside of these sacs is called synovial fluid.
