Circulatory/Respiratory Crossword

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Across
  1. 3. high blood pressure
  2. 8. only artery to carry deoxygenated blood
  3. 12. people with high blood pressure should reduce this in their diet
  4. 13. trachea is made out of rings of this to keep it open at all times
  5. 14. muscles demand more of this when exercising
  6. 15. largest artery
  7. 19. also known as the voicebox
  8. 20. the heart is made out of
  9. 21. prevent backflow of blood
  10. 22. clots blood
  11. 23. usually carry deoxygenated blood
  12. 25. fight infection
  13. 27. heart weighs about
Down
  1. 1. kind of blood that flows through veins
  2. 2. lower chambers of the heart
  3. 4. top number in a blood pressure reading
  4. 5. place where oxygen and carbon dioxide are exchange in the circulatory system
  5. 6. circulatory system is made up of the heart, blood vessels and
  6. 7. place where air is cleaned, moistened, and warmed before entering the lungs
  7. 9. upper chambers of the heart
  8. 10. blocked or broken blood vessel in the brain
  9. 11. part of the red blood cell that carries oxygen
  10. 16. place in the lungs where oxygen is exchanged for carbon dioxide
  11. 17. direction arteries carry blood from the heart
  12. 18. largest vein
  13. 24. heart is the size of your
  14. 26. prevents food from entering trachea
  15. 28. bottom number in blood pressure reading