Respiratory System

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Across
  1. 3. infection in the lungs
  2. 4. main function of the respiratory system
  3. 5. smoking greatly increases your risk of getting this disease
  4. 6. filters the air that you breathe
  5. 8. they transport oxygen and carbon dioxide to and from the lungs
Down
  1. 1. contracts when you inhale, expands when you exhale
  2. 2. take in oxygen
  3. 4. widening or destruction of airways
  4. 6. inflammation of the tonsils
  5. 7. two tubes connecting the trachea and the lungs