Keywords:
aortic arch 4,
aortic arch 6,
ascending aorta,
ductus venosus,
left atrial endothelium,
left common cardinal vein,
left horn of sinus venosus,
left marginal limb vein,
left precardinal vein,
left ventricular endothelium,
right atrial endothelium,
right hepatocardiac vein,
umbilical vein
Source: The Virtual Human Embryo.