Human circulatory system

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Across
  1. 4. carries water, oxygen and the nutrients to cells
  2. 6. a gas important for life
  3. 10. heart, blood, veins and arteries together
  4. 12. they carry blood away from the heart to the organs
  5. 13. very small blood vessels, one cell thick
  6. 16. the colour of plasma
  7. 17. it gives the red colour to the bood
  8. 18. a type of fat deposited on the arteries wall, the main reason of heart attacks
  9. 19. it is the pressure of the blood that can be felt in certain points of the body
Down
  1. 1. a gas that is the waste after feeding the cells
  2. 2. the pressure of blood when heart contracts
  3. 3. strand that help blood to clot
  4. 5. blood vessels that return the blood back to the heart for another load of oxygen
  5. 7. it pumps 4.5 litres of blood every minute
  6. 8. the blood pressure when heart relaxes
  7. 9. broken-up cells from the blood
  8. 11. a liquid in which red and white blood cells are suspended
  9. 14. a cell from blood which does not have a nucleus
  10. 15. they help us against microbes