Which of the following is NOT included in the eight bones of the arm?

The pinky, also known as the little finger, is not classified as one of the bones of the arm. The arm comprises a specific set of bones that include the humerus, radius, and ulna, as well as the bones of the shoulder girdle, which include the clavicle and scapula. The pinky is a digit and is part of the hand rather than the arm itself. Understanding the distinction between the bones that compose the arm and those that make up the hand is essential in anatomy, particularly in fields related to physical therapy, sports medicine, and nail technology, where knowledge of limb structure is crucial.