Summary of Fetal circulation
Fetal circulation does not involve the lungs, which are bypassed thanks to the ductus arteriosus. The ductus arteriosus carries part of the oxygenated blood coming from the pulmonary trunk directly into the aorta. The ductus venosus instead is the shunt, present only during fetal life, through which oxygenated blood goes from the umbilical vein into the inferior vena cava. The foramen ovale allows the passage of oxygenated blood from the right atrium to the left atrium.
Flashcards on Fetal circulation
Oxygen saturation in the umbilical is around 58%.