The Ball and Socket joint. There are seven types in humans, and the ball-and-socket is the most movable. it allows nearly every plane and style of movement except gliding. Examples of ball and socket joints would be shoulders and hips. read more
A movable joint is the most common type of joint in the human body, and freely moving ones are found wherever movement is important. They are more commonly known as synovial joints because each contains synovial fluid — a liquid that helps to decrease friction when the joint moves. read more