De oxygenated blood from the superior & inferior vena cava empties into the R atriumThrough the tricuspid valveInto R ventricle 4 Through pulmonary semi-lunar valvePulmonary artery (unique* carries de-oxygenated blood)LungsPulmonary veins (unique* carries oxygenated blood)L atriumThrough bicuspid valve/mitral valveL ventricleThrough Aortic semi lunar valveAorta