Question

Foetal passage between aortic and pulmonary arches is

• A. Foramen rotundum
• B. Foramen caecum
• C. Ductus arteriosus
• D. Ligamentum arteriosum

Answer 1

Answer: (C)

Ductus arteriosus

The foetal passage between aortic and pulmonary arches is called as ductus arteriosus. It is a blood vessel connecting the main pulmonary artery to the proximal descending aorta. It allows most of the blood from the right ventricle to bypass the fetus's fluid-filled non-functioning lungs. At birth, the passage (Ductus arteriosus) is closed and is called as ligamentum arteriosum.

So, the correct answer is 'Ductus arteriosum'.