This article waslast modified on July 10, 2017.
Point where two or more bones meet in the body; they allow the body to be flexible and are classified by their range of movement: immovable (fibrous) do not move, such as in the skull, slightly movable (cartilaginous) as in the vertebrae in the spine, or freely movable (synovial) as in the knees and elbows, which move in many directions and are further classified as hinge, pivot or ball-and-socket joints.