Is it true that the humerus is proximal to the radius and ulna?

The statement that the humerus is proximal to the radius and ulna is true because, in anatomical terms, "proximal" refers to a position that is closer to the point of attachment or the trunk of the body. In the case of the arm, the humerus is the single bone that forms the upper arm and is situated closer to the shoulder (the trunk) compared to the radius and ulna, which form the forearm and are located further away from the shoulder joint. This positional relationship holds in standard anatomical terminology, which allows for consistent understanding of human anatomy. Therefore, the humerus being proximal to both the radius and ulna is an accurate characterization of the spatial arrangement of these bones in the upper limb.