Respiratory

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Across
  1. 2. action of breathing
  2. 6. muscular partition separating thorax& abdomen
  3. 8. external openings of the nasal cavity
  4. 9. airways that lead from the trachea to lungs
  5. 11. hollow muscular organ forming an air passage
Down
  1. 1. Hairlike structure that provides propulsion
  2. 3. muscular tube connecting the throat & stomach
  3. 4. membrane-lined cavity behind the mouth
  4. 5. tiny air sacs in the lungs
  5. 7. membranous tube reinforced by cartilage
  6. 10. pair of spongy, air-filled organs