The elbow is a hinge joint. It connects the further end of the humerus and the nearest ends of two lower-arm bones: the ulna and radius. The elbow flexes and extends the forearm, and rotates the ...

Included in the package are six well-preserved arm and leg bones, each of which is labeled. There is one radius (R1) and one ulna (U1); these are the two bones that connect the wrist and elbow.

bones also work together with muscles and tendons to get the body moving. For example, the humerus, radius and ulna work with your biceps and triceps to curl or extend your arm. Having many joints ...