circulatory and respiratory system

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Across
  1. 2. common passageway for food and air
  2. 4. muscle aiding
  3. 7. hardening of arteries
  4. 8. occupy space in the lungs used for gas exchange
  5. 9. largest artery
  6. 13. increase of number of the leukocytes
  7. 14. process of gas exchange
  8. 16. prevents backflow of blood
  9. 20. helps with clotting
  10. 22. high blood pressure
  11. 24. leads to uncontrollable bleeding
  12. 25. organ that pumps blood
  13. 28. contagious illness
  14. 29. disease of the arteries
  15. 30. breathing in
  16. 31. white blood cells
  17. 34. river of life
  18. 35. organ for gas exchange
  19. 36. swelling of the breathing passage
  20. 37. infectious disease
  21. 38. is a long term disease
Down
  1. 1. physical action of taking oxygen
  2. 3. wall dividing heart chambers
  3. 5. blood vessels that move blood away from the heart
  4. 6. windpipe
  5. 10. traps platelets
  6. 11. small flap in throat
  7. 12. rate of heartbeat per minute
  8. 15. refers to any infection in the lungs
  9. 17. lymphatic tissues in throat
  10. 18. is a chronic allergic condition
  11. 19. blood count is low
  12. 21. gas we inhale
  13. 23. liquid part of blood
  14. 24. protein containing iron
  15. 26. leads to the digestive system
  16. 27. tiny air sacs in lungs
  17. 32. red blood cells
  18. 33. cholesterol buildup
  19. 38. breathing out