Sinovyal eklem, or synovial joint, is a type of joint in the body that allows for a wide range of movement. These joints are characterized by a fluid-filled space called the synovial cavity, which helps reduce friction between the bones. Common examples of synovial joints include the knee, elbow, and shoulder. The synovial cavity is surrounded by a capsule made of connective tissue, which provides stability and support. Inside the cavity, synovial fluid is produced, lubricating the joint and nourishing the cartilage that covers the ends of the bones. This structure enables smooth and efficient movement in daily activities.