Respiratory System

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Across
  1. 3. waste gas that we breathe out
  2. 4. Another name for air sacs
  3. 6. Chamber behind nose and mouth leading to esophagus and trachea
  4. 8. Common condition in children which causes difficulty in breathing
  5. 12. What we can do to keep our lungs healthy
  6. 14. Another name for voice box
  7. 15. Breathe in, expanding the lungs
Down
  1. 1. Tubes that connect the trachea to the lungs
  2. 2. cleans, moistens and warms the air we breathe
  3. 5. vital organs of the body that helps us breathe
  4. 7. Disease resulting from many years of smoking
  5. 9. Another name for windpipe
  6. 10. Chemical in cigarettes that can permanently damage the lungs
  7. 11. Dome-shaped sheet of muscle, main muscle for breathing
  8. 13. Flap of tissue that prevents food from going down the trachea