The heart contains 4 chambers: two atria and two ventricles. Correct answer: B
The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle, while the left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.The right ventricle pumps the oxygen-poor blood to the lungs, while the left ventricle pumps the oxygen-rich blood to the body.
