A) two systemic arches
B) pulmonary and systemic arches
C) systemic and carotid arteries
D) carotid and pulmonary arteries
Correct Answer: B
Solution :
In the developing foetus, the ductus Botalli or ductus arteriosus, is a shunt connecting the pulmonary artery to the aortic arch. It allows most of the blood from the right ventricle to bypass the foetus fluid-filled lungs, protecting the lungs from being over worked and allowing the right ventricle to strengthen.
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