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2. What happens during atrial systole

  • The atria fill up with blood
  • The ventricles contract forcing blood through the semi lunar valve
  • The atria contract forces blood into ventricles
  • The heart is at rest

3. The vena cava pumps blood to one of the chambers when it returns to the heart, which one?

  • Right atrium
  • Left atrium

4. What are the role of the semi lunar valves during diastole

  • It prevents the backflow of blood from the arteries
  • It pushes the blood through the arteries

5. Which chamber pumps the blood to the pulmonary artery?

  • The right artrium
  • The right ventricle
  • The left ventricle
  • The left atrium
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