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.

Osteology is an area of anthropology that includes the study of human and animal bones and anatomy. This can help ... animals are made of with this ‘humerus’ skeleton quiz.