The septum between the right and left atria has an opening, called the _______________, which usually closes after birth, isolating the deoxygenated blood that returns to the heart from the oxygenated blood that returns from the lungs.

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Quizplus · Accepted Answer

The foramen ovale in the muscular septum between the right and left atria normally closes after birth. The foramen magnum is at the base of the skull. The foramen Magendie connects the fourth ventricle of the brain to the subarachnoid space. The foramen cecum of the frontal bone is an opening in the anterior portion of the skull.

The Septum Between the Right and Left Atria Has an Opening