which three vessels bring deoxygenated blood to the right atrium
divides into the arteries that supply the forearm, the radial a. that follows the radius, and the ulnar a. that follows the ulna. Both the radial and ulnar aa. extend to the wrist. The systemic veins return deoxygenated blood to the right atrium of the heart via the superior vena cava and inferior vena cava.