Bones and muscles of the arm in cross-section; fascia of the hand, shown in isolation in 4 numbered illustrations. 1 illustration of the arm divided in transverse section near the axilla, showing the humerus and muscles. 2 illustrations of the lower arm divided in transverse section to show radius, ulna, and muscles. 1 illustration of the hand, superficial dissection, showing fascia of the palm, anterior view.