THE RESPIRATORY SYSTEM

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Across
  1. 4. muscle that helps lungs get air in and out of the body
  2. 6. what we breathe
  3. 7. the small bulb sacs at the end of bronchioles
  4. 9. when the body takes in oxygen and gets rid of carbon dioxide
  5. 11. the main part of the respiratory system
Down
  1. 1. causes very bad disease in the lungs
  2. 2. tubes that bring air to and from the lung3ls
  3. 3. also called the windpipe
  4. 5. a harmful waste gas; carbon dioxide is an example
  5. 8. also called the voice box
  6. 10. one of two places where air enters your body