The structure marked A begins to close by what time frame and due to what cause?
Correct Answer: Begins to close at 10-15 hours after bih, due to withdrawal of prostaglandins
Description: The structure marked is ductus aeriosus which begins to close 10-15 hours after bih due to withdrawal of prostaglandins and exhibits functional closure by 7 days and anatomical closure by 4 weeks after bih.
Category:
Anatomy
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