If the ductus arteriosus fails to close after birth,blood shunts from the aorta to the

Question

Quizplus · Accepted Answer

The ductus arteriosus is a fetal blood vessel that connects the pulmonary artery to the aorta, allowing oxygen-poor blood to bypass the non-functioning fetal lungs. At birth, the lungs become functional and the ductus arteriosus normally closes within the first few hours to days of life. If it fails to close, blood will shunt from the aorta (oxygen-rich blood) to the pulmonary artery (oxygen-poor blood), leading to a condition known as a patent ductus arteriosus (PDA). Therefore, the best choice is A.

If the Ductus Arteriosus Fails to Close After Birth,blood Shunts