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6. 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

7. What happens during atrial systole

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