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Foetal passage between aortic and pulmon...

Foetal passage between aortic and pulmonary arches is
(a) Foramen rotundum
(b) Foramen caecum
(c) Ductus arteriosus
(d) Ligamentum arteriosum

A

Foramen rotundum

B

Foramen caecum

C

Ductus arteriosus

D

Ligamentum arteriosum.

Text Solution

AI Generated Solution

The correct Answer is:
To determine the fetal passage between the aortic and pulmonary arches, we can analyze the options provided: 1. **Understanding the Question**: The question asks for the name of the fetal passage that connects the aortic and pulmonary arches. 2. **Analyzing the Options**: - **(a) Foramen rotundum**: This is a structure in the cranial fossa and is not related to the fetal circulation. - **(b) Foramen caecum**: This is a small opening in the frontal bone of the skull and also not related to fetal circulation. - **(c) Ductus arteriosus**: This is a blood vessel that connects the pulmonary artery to the aorta in the fetus, allowing blood to bypass the non-functioning lungs. - **(d) Ligamentum arteriosum**: This is the remnant of the ductus arteriosus after birth when it closes, but it does not function as a passage. 3. **Identifying the Correct Answer**: The ductus arteriosus is the correct answer because it is the structure that serves as the passage between the aortic and pulmonary arches during fetal development. 4. **Conclusion**: The correct answer is **(c) Ductus arteriosus**.
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