When a baby is born, what change(s) need to occur in fetal circulation for it to survive?
A) The oval opening (foramen ovale) must close.
B) The arterial duct must close.
C) The umbilical arteries and veins close.
D) Fetal blood must be shunted toward the lungs after tying off the umbilical cord.
E) All of the answer choices describe changes that need to occur in order for the baby to survive.

Question

Quizplus · Accepted Answer

All of the answer choices are necessary for the baby to survive. The closure of the oval opening (foramen ovale) and arterial duct ensure that blood is properly flowing to and from the heart. The closure of the umbilical arteries and veins is necessary as they are no longer needed once the baby is born. And finally, shunting of fetal blood towards the lungs is necessary for oxygen exchange to take place.

When a Baby Is Born, What Change(s) Need to Occur