Question

Mixing up of arterial and venous blood does not take place in a___________ heart.

• A. Two chambers
• B. Four chambers
• C. Three chambers
• D. Multi-chambered

Answer 1

Answer: (B)

Four chambers

• A heart with four chambers has two atria and two ventricles.

Here the right ventricle pumps the oxygen-poor blood to the lungs and the left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle. The left ventricle pumps oxygen-rich blood to the body.

• The right side of the heart is separated from the left side due to the presence of the septum.
• Hence, option B is correct.