right auricle  |  right atrium | Note the dark entrance of the coronary sinus, the drainage from coronary venous blood;  and the light fossa ovalis, the remnant of the fetal foramen ovale which shunts fetal blood from the right atrium to the left atrium  |  right coronary artery   |  pulmonary trunk   | pulmonary valve |  superior vena cava |  aorta  | upper surface of the tricuspid valve |  chordae tendineae of the tricuspid valve | trabeculae (lining the right ventricle) | inferior vena cava |  right pulmonary artery  |  right pulmonary veins