Other questions in this quiz

2. Why are capillary walls (endothelium) only one cell thick?

  • To speed up diffusion
  • To make them smaller

3. What does the pulmonary artery do?

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

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. Do arteries have thick or thin muscle layer?

  • Thick
  • Thin


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