All about the heart and blood vessels!

The heart

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1. Why does the left ventricle have thicker walls than the right ventricle?

  • needs to contract powerfully to pump blood all the way round the body but right side only needs to get blood to the lungs, which are nearby
  • less well supported
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Other questions in this quiz

2. Do arteries contain valves?

  • No
  • Yes

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

  • open
  • shut

4. Why is the endothelium in the artery folded?

  • to allow the artery to expand, helping it to cope with high pressure
  • to give it a large surface area

5. How is blood helped to flow through veins?

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

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