Respiratory System Crossword Puzzle

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Across
  1. 4. The system of the way someone breathes
  2. 6. The larynx is between the throat and this
  3. 7. Theses are tiny balloon-like clusters located at the smallest air passage within the lungs
  4. 8. The tube between the throat and the trachea
  5. 9. Where air enters the body mainly
Down
  1. 1. This flattens down when the respiratory centre signals the chest muscles to contract
  2. 2. Another word for the throat
  3. 3. The two main breathing organs
  4. 4. An area in the brain that controlles breathing
  5. 5. Airtight skin that surronds and cushions the lungs