Other questions in this quiz

2. What are valves (in a blood vessel) used for?

  • Photosynthesis
  • To direct the flow of blood
  • To stop the blood from flowing
  • Transport

3. Why are capillaries most efficient at diffusion?

  • There's lots of them
  • Their walls are 1 cell thick
  • They're badass
  • Their lumen is really big

4. What is plasma mostly made of?

  • Water
  • Red blood cells
  • Plasma
  • Nitrate ions

5. Where is haemoglobin found?

  • In the blood
  • In the red blood cells
  • In the plasma
  • In the white blood cells

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