Fetal Circulatory System: The fetal circulatory system includes unique structures like the ductus arteriosus and foramen ovale that shunt blood away from non-functioning fetal lungs and prioritize oxygen-rich blood from the placenta.
Fetal Circulation: Fetal circulation features shunts like the ductus venosus, foramen ovale, and ductus arteriosus that divert blood away from the liver and lungs, directing it efficiently between the heart and placenta.