Ball-and-socket joints are a type of synovial joint that allows for a wide range of motion. They consist of a spherical head (the "ball") that fits into a cup-like structure (the "socket") of another bone. This design enables movement in multiple directions, including rotation. Common examples of ball-and-socket joints include the shoulder and hip joints. These joints are crucial for activities that require flexibility and mobility. The shoulder joint allows for arm movements in various planes, while the hip joint supports walking, running, and other leg movements. Their unique structure makes them essential for many daily activities.