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It allows blood to pass from the inferior vena cava to the aorta without ultilizing the lungs, since fetuses can't breath. If you had this is an adult heart, you would suffocate as you would not be able to use your lungs and you wouldn't be receiving oxygen from your mother.

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13y ago
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13y ago

It allows blood to pass from the inferior vena cava to the aorta without ultilizing the lungs, since fetuses can't breath

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Q: Why is the fetal heart benefited by having an oval opening but the adult heart is impaired if it remains?
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