What may happen if the ductus arteriosus fails to close shortly after birth?
A. Blood may flow from the right atrium to the left atrium.
B. The walls of the heart may become thin and flaccid.
C. Blood may flow from the aortic arch to the lungs.
D. The coronary arteries may have abnormally increased blood flow.
E. Valvular stenosis may interrupt blood flow.
Answer: C
Anatomy & Physiology
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