There are three main types of articulations or joints: fibrous joints, cartilaginous joints, and synovial joints. Fibrous joints are immovable, cartilaginous joints are slightly movable, and synovial joints are freely movable. Synovial joints can be uniaxial, biaxial, or multiaxial, allowing movement in one, two, or multiple planes. Common synovial joints include ball-and-socket, hinge, gliding, saddle, and condyloid joints.