right ventricle  |  right atrium | Note the lighter stained 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 |  tricuspid valve |  chordae tendineae | trabeculae (lining the ventricle) | anterior interventricular artery |  left auricle