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MCAT Question A Day - 6/15/13

The fetal heart has an opening between the two atria, called the foramen ovale, which allows blood to flow directly from the right atrium to the left atrium. What results from blood flowing through this opening?

A.  It bypasses the fetal lungs.
B.  It ensures that the fetal lungs receive extra blood.
C.  It bypasses both ventricles.
D.  It provides additional time for the blood to pick up extra oxygen.