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Normal Circulation in a Fetus

Normal Circulation in a Fetus
Normal Circulation in a Fetus

In the fetus, blood entering the right side of the heart has already been oxygenated via the placenta. Because the lungs are not ventilated, only a small amount of blood needs to go through the pulmonary artery. Most of the blood from the right side of the heart bypasses the lungs through the The foramen ovale The ductus arteriosus Normally, these two structures close shortly after birth.