Question

Statement I: In the foetal heart of human beings, the interatrial septum has a pore called foramen Manro. Statement II: A fibrous strand, known as ligamentum arteriosum, is present at the point of contact of the systemic and pulmonary arches in the human heart.

• A. Both statements I and II are true.
• B. Both statements I and II are false.
• C. Statement I is true, but II is false.
• D. Statement I is false, but II is true.

Hint:

The foramen ovale allows blood to bypass the fetal lungs, and the ductus arteriosus later forms the ligamentum arteriosum.

Answer 1

The Correct Option is D

Step 1: Understanding the Fetal Circulatory Adaptations
- Statement I is incorrect: The correct name of the fetal heart opening is foramen ovale, not foramen Manro.
- Statement II is correct: The ligamentum arteriosum is a remnant of the ductus arteriosus, connecting the pulmonary and systemic circulation.