Multiple choice

Why is the human heart four-chambered?

  1. To protect the heart from mechanical shocks

  2. To allow the assimilation of various nutrients in blood

  3. To prevent the backflow of blood

  4. To prevent the mixing of oxygenated and deoxygenated blood
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The heart has different chambers to prevent the oxygen-rich blood from mixing with the blood containing carbon dioxide. The carbon dioxide-rich blood has to reach the lungs for the removal of carbon dioxide, and the oxygenated blood from the lungs has to be brought back to the heart. 

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