Fetal cardiovascular
   system

  Enriched blood via
    umbilical vein, ductus
    venosus, IVC to RA,
    foramen ovale to LA
    to LV to aorta

Depleted blood  to RA,
    to RV to pulmonary
    artery, ductus arteriosus,
    aorta, umbilical arteries
    to placenta