Question

The perforation between left and right atria of a fetal heart is known as

• A. Foramen ovale
• B. Ductus arteriosus
• C. Fossa ovalis
• D. Ligamentum arteriosum

Hint:

Review the fetal circulatory structures and their transformations after birth.

Answer 1

The Correct Option is A

Crucial for fetal circulation, the foramen ovale enables blood to flow directly from the right to the left atrium, bypassing the inactive fetal lungs. After birth, increased pressure in the left atrium prompts its closure, forming a depression known as the fossa ovalis.