Unit 1 revision

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1. Which four components does blood have?

  • Plasma, red blood cells, white blood cells and platelets
  • Red blood cells, antibodies, white blood cells and plasma
  • Veins, red blood cells, white blood cells and plasma
  • Plasma, red blood cells, antibodies and veins
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2. What are the three components of the cardiovascular system?

  • veins, arteries and capillaries
  • lungs, heart and blood vessels
  • heart,blood vessels and blood
  • blood, heart and lungs

3. What do valves do?

  • Let the blood flow in and out both ways
  • Stop blood entering the heart
  • Prevent the blood from flowing backwards
  • Open and close

4. Which blood vessel carries out gaseous exchange?

  • Capillaries
  • Arteries
  • Veins

5. What does the blood do when exercising?

  • Gives nutrients, gives oxygen, sweats and builds muscle
  • Cools down, transports nutrients, hydrates and sweats
  • Transports nutrients, delivers oxygen, removes heat and lactic acid
  • Sweats, gives muscles energy, hydrates and removes heat

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