Hands are pretty neat when you think about them. They do everything from holding onto your dog's leash real tight to delicate things such as painting a picture in Art Class. How can your hands do all of that? With the help of hinge joints, of course!

Your fingers use hinge joints (back-and-forth movements like hinges on a door). Elbows, knees and your feet also have these types of joints.

Hinge joints are classified as a movable joint. The other movable joints in your body are pivot, ball-and-socket and gliding joints.