The sequence of oxygenated blood from the placenta to the fetal hea is ________: (A) Umbilical aery - Inferior vena cava - ductus venosus - right atrium - left atrium, (B) Umbilical aery - Superior vena cava - right atrium - ductus aeriosus - left atrium, (C) Umbilical vein - ductus venosus - inferior vena cava - right atrium - left atrium, (D) Umbilical vein - ductus aeriosus - superior vena cava - right atrium - left atrium
Answer is C. The sequence of oxygenated blood flow from the placenta to the fetal hea is Umbilical vein - ductus venosus - inferior vena - right atrium - left atrium. Ref: Nelson textbook of pediatrics 21st edition pGno: 2345