In Fetal Circulation, Most Blood Is Shunted Away from the Lungs

Multiple Choice

In fetal circulation, most blood is shunted away from the lungs. Why is this the case?

A) The lungs have their own circulation.
B) The lungs don't need any blood.
C) The lungs do not form until right before birth.
D) The fetus receives oxygen at the placenta, and the lungs are not yet fully functional.