aorta aorta aortic_valve aortic_v body body cleanse clean carbon contract contrac diastolic diastol endocardium endocar epicardium epicar inferior_vena_cava inferior left_atrium left_atri left_ventricle left_vent lungs lung membranes membran mitral_valve mitral bicusp atrioventricular myocardium myocard oxygen oxygen pericardium pericard pulmonary_artery pulmonary_art pulmonary_valve pulmonary_val pulmonary_veins pulmonary_vei relax relax right_atrium right_atri right_ventricle right_vent superior_vena_cava superior systolic systol tricuspid tricuspid