What fetal structures aid in by-passing the pulmonary circuit?
A)Umbilical veins
B)Foramen ovale
C)Ductus arteriosus
D)Both foramen ovale and ductus arteriosus

Question

Quizplus · Accepted Answer

The foramen ovale and ductus arteriosus are the two fetal structures that aid in by-passing the pulmonary circuit. The foramen ovale allows the blood to flow from the right atrium of the heart to the left atrium, bypassing the lungs. The ductus arteriosus allows the blood to flow from the pulmonary artery to the aorta, bypassing the lungs as well.

What Fetal Structures Aid in By-Passing the Pulmonary Circuit