Respiratory Crossword

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Across
  1. 4. a different name for number 2
  2. 5. how the air travels from the mouth to the lungs
  3. 7. first part of the respiratory system
  4. 8. works with the respiratory system to transport oxygen, digested food and water to all parts of the body.
Down
  1. 1. blocks bacteria and dust particles fron entering the lungs
  2. 2. found in the lungs
  3. 3. is where the exchange of gases take place
  4. 6. is similar to the windpipe but it is for a different purpose