Relier Pairs Heart EmbryologyVersion en ligne Match the structure with what it gives rise to par Jimmy Jennings 1 primitive ventricle 2 truncus arteriosus 3 right common cardinal vein and right anterior cardinal vein 4 primitive atrium 5 left horn of sinus venosus 6 endocardial cushion 7 right horn of sinus venosus 8 bulbus cordis 9 primitive pulmonary vein smooth left atrium trabeculated LV and RV coronary sinus ascending aorta/pulmonary trunk smooth parts of lv and rv superior vena cava atrioventricular node, semilunar valves, trabeculated part of LA and RA smooth part of right atrium atrial septum, membranous interventricular septum