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"). This design enables movement in multiple directions, including rotation, making them essential for activities like reaching and throwing. The most well-known examples of ball and socket joints in the human body are the shoulder and hip joints. These joints provide stability while allowing flexibility, which is crucial for various physical activities and overall mobility.