Trace the pathway of blood. Start at the right atrium and continue until the blood re-enters the right atrium. (You will use the right atrium card twice.)

Answer:
right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary artery, lungs, pulmonary vein, left atrium, mitral valve, left ventricle, aortic valve, aorta, arteries, body tissue, veins, vena cava, right atrium.