(2 arteries)
1. Vitelline circulation - yolk sac
2. Chorionic circulation - placenta
1
2
Langman’s Medical Embryology, 8th ed., TW Sadler Lippincott, Williams & Wilkins (Philadelphia) 2000, p. 247 (revised)
Vitelline
(omphalomesenteric) vein through developing liver
Umbilical vein - ductus venosus - liver