• Joints are places where two or more bones of the skeleton meet.
  • With the help of muscles, joints allow the body to move with relatively little force.
  • There are three main types of joints: immovable, partly movable, and movable.
  • A ball-and-socket joint, such as the shoulder, has the greatest range of motion.
  • Other joints in the human skeleton that are not depicted here include saddle, ellipsoid, and plane joints.
  • Try moving each of the joints indicated in the diagram to see how they move.
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