Science- Body Systems

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Across
  1. 3. air sacs in which gas exchange takes place
  2. 4. the other name for white blood cells
  3. 6. the smallest blood vessels
  4. 8. it takes out toxins in our body
  5. 9. the gas we breathe out
  6. 10. the top two chambers of the heart
  7. 12. the flap of skin that prevents food going down the trachea
  8. 14. they filter the waste in our blood
  9. 16. the pressure of blood flowing through your arteries
  10. 17. takes blood from the heart to the lungs
  11. 19. the fluid in our circulatory system that delivers oxygen to cells
  12. 20. the bottom two chambers of the heart
  13. 22. they aid in clotting blood
  14. 25. prevents blood flowing backward
  15. 26. the other name for red blood cells
  16. 28. the two pipes that branch out of the trachea
  17. 29. they carry blood to the heart
  18. 31. sheet of muscle below your lungs
  19. 32. it brings deoxygenated blood to the heart from the upper parts of the body
Down
  1. 1. the branches that have air sacs at the end
  2. 2. the system that transports dissolved chemicals and gases
  3. 5. scientific name for windpipe
  4. 7. they carry blood away from the heart
  5. 11. the tubes that carry blood all over the body
  6. 12. breathing out
  7. 13. takes blood from the lungs to the heart
  8. 15. breathing in
  9. 18. it pumps blood to the body
  10. 21. straw colored liquid that makes up 55% of our blood
  11. 23. also called voice box
  12. 24. the scientific name for food pipe
  13. 27. the gas we breathe in
  14. 30. it brings deoxygenated blood to the heart from the lower parts of the body