The Heart Q1. How many chambers is the heart made up of? ____________________________________________ Q2. Which side of the blood contains deoxygenated blood? ____________________________________________ Q3. How does the heart manage to pump blood around the body? ____________________________________________ Q4. What stops the backflow of blood in the heart? ____________________________________________ Q5. Which organ oxygenates the blood? ____________________________________________ Q6. Which chambers are smaller, the atria or the ventricles? ____________________________________________ Q7. Why is the left side of the heart thicker than the right side? ____________________________________________