The flaplike opening in the interatrial septum of the fetus through which blood is shunted from the right to the left atrium is the foramen ovale.
Patent foramen ovale can be described as the flaplike opening that is been found in between the atrial septa primum and secundum .
This is been located at the at the fossa ovalis and do persists after age 1 year, it should be noted that foramen ovale serves as a physiologic conduit , hence The flaplike opening in the interatrial septum of the fetus through which blood is shunted from the right to the left atrium is the foramen ovale.
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