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I used my fingers to show you how a planar joint opens and closes.

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I used my elbow to how you how a hinge joint opens and closes.

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I used my head to show you how a pivot joint moves from left to right.

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I used my finger to show how a condyloid joint moves up and down and left and right.

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I used my thumb to show you how saddle joints move in a great range of motion.

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I used my shoulder to show you how the ball and socket joint functions.