Body+Bones+and+Joints+Organizer

The humerus, radius, and ulna each make up the elbow bone. The joint that these three bones make is a hinge joint. The humerus bone is what we call the funny bone. The ulna is the arm bone along the pinky, and the radius is the arm bone along the thumb. The carpals and metacarpals are the bones in your hand. The carpal bones make up your wrist while the metacarpal bones make up the bones in your fingers.