Respiratory System Crossword

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Across
  1. 4. Tubes branch into - tubes in the lungs
  2. 7. Two tubes trachea branches into
  3. 8. Moves up or down as air moves in and out of body
  4. 10. Taking in oxygen and breathing out CO2
  5. 12. sacs in lungs where gas exchange occurs
  6. 13. Windpipe- carries air from mouth to lungs
  7. 14. Produces sound
Down
  1. 1. The gas that we inhale
  2. 2. Back of throat, above larynx
  3. 3. Vessels surrounding the alveoli
  4. 5. Filters air moving into body
  5. 6. Breathing out
  6. 9. One of the waste products from the lungs
  7. 11. Breathing in
  8. 14. Structures in the chest cavity that fill with air