There is one radius (R1) and one ulna (U1); these are the two bones that connect the wrist and elbow. There are two humerus bones (H1 and H2). The humerus connects the shoulder and the elbow.
Specimen shown and case reported at the meeting of the Surgical Section of the Suffolk District Medical Society, December 4, 1895.
A ball and socket joint is made up of a round end of one bone that fits into ... Ball and socket joint. Articulating bones are humerus and scapula (the clavicle is not part of the shoulder joint).