bio

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Across
  1. 4. Waste material secreted by the kidney
  2. 5. Substance that goes from high to low area of concentration
  3. 6. Carries substances except oxygen
  4. 8. suffering from anaemia
  5. 11. Destroys microorganisms
  6. 12. pumps blood
  7. 13. supplies the body with oxygen
  8. 14. prevents backflow
Down
  1. 1. blood vessels that connect the arteries and the veins
  2. 2. carries oxygen and nutrients away from the heart pumps blood
  3. 3. Carries oxygen
  4. 7. Lower red blood cell or haemoglobin concentration
  5. 9. Remove waste from the body
  6. 10. form blood clots
  7. 15. carries blood back to the heart