Overview Umbilical vein login to view 1 more bullet Umbilical arteries login to view 1 more bullet Erythropoeisis login to view 1 more bullet Circulatory Shunts Ductus venosus login to view 2 more bullets Foramen ovale login to view 2 more bullets Ductus arteriosus login to view 3 more bullets Infant's first breath First breath login to view 7 more bullets Fetal Erythropoiesis Hemoglobin login to view 9 more bullets