Normally after birth, the blood entering the right side of theheart (right atrium) is low in oxygen, while the blood leaving theleft side of the heart and entering the body’s main circulation(the aorta) is high in oxygen. However, sometimes the foramen ovalefails to close after birth. What effect will this have on the levelof oxygen in the blood that leaves the heart to enter into theaorta? Fully explain why.
