Question

Q. Which of the following statements is/are correct about the functioning of the human heart?

Select the correct code from the options given below:

• A. 1, 3 only
• B. 2, 4 only
• C. 1, 2, 3, 4
• D. None of the above

Answer 1

The correct option is C 1, 2, 3, 4

Explanation:

Blood flows through the heart in four steps:

1. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve.
2. The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve.
3. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve.
4. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.