Respiratory System Crossword

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Across
  1. 3. protects trachea from getting food in it when breathing
  2. 6. name of system that helps us breathe
  3. 7. carry air to alveoli
  4. 9. carries air into and out of the lungs
  5. 10. absorb oxygen from air and get rid of CO2
  6. 12. breathing in oxygen and lungs expand
  7. 13. aka the throat
Down
  1. 1. site of gas exchange
  2. 2. allows air to enter and leave the body
  3. 4. allows air to enter and leave the body
  4. 5. what the trachea branches into
  5. 8. breathing out carbon dioxide and lungs relax
  6. 11. muscle under the lungs