Other questions in this quiz

2. If there is higher pressure behind a valve, is it forced open or shut?

  • open
  • shut

3. Do arteries have thick or thin muscle layer?

  • Thick
  • Thin

4. How is blood helped to flow through veins?

  • by the valves
  • by contraction of body muscles surrounding them
  • by the veins contracting

5. What does the pulmonary artery do?

  • Pump deoxygenated blood to the lungs
  • bring oxygenated blood back from the lungs
  • bring deoxygenated blood back from the body
  • pump oxygenated blood to the body

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