In the fetal heart, the foramen ovale allows blood to flow between which two structures?
a. Bypass the liver and enter the inferior ve-na cava.
b. Pulmonary artery to aortic arch.
c. Right atrium to left atrium.
d. Right atrium to left ventricle.
ANS: C
Approximately 50% of this blood is shunted from the right atrium into the left atrium through an opening in the interatrial septum called the foramen ovale.
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