RESPIRATORY SYSTEM

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Across
  1. 4. these structures bring air into the body and prepare it for the lungs
  2. 5. tiny ballon like air sacs in the lungs, where the crucial exchange of oxygen and carbon dioxide
  3. 7. a condition involving chronic inflammation
Down
  1. 1. this protects the airway and produces sound
  2. 2. the main airway connecting the larynx, to the bronchi
  3. 3. any of the major air passages of the lungs
  4. 6. are primary organs of the respiratory system