Ball-and-socket joints, also known as hip joints, are a type of synovial joint that allow for a wide range of movement. They are formed by the articulation of a rounded end of one bone fitting into a cup-like depression of another bone. The ball-and-socket joint is found in the shoulder and hip, allowing for movement in multiple directions. This type of joint is the most mobile of all the joints in the body, allowing for a greater range of motion than other types of joints.