Pulmonary Crossword

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Across
  1. 4. Organ where gas exchange occurs
  2. 5. Primary muscle for breathing
  3. 7. How you should breath in
  4. 8. Physical activity to help breathing efficiency
  5. 9. Learning about a lung disease process
  6. 11. Instrument used to measure oxygen in the blood
Down
  1. 1. 4% gas that is exhaled
  2. 2. How you should breath out
  3. 3. Relating to the lungs (hint: title of crossword)
  4. 5. Shortness of breath
  5. 6. What carries oxygen to the body
  6. 10. 21% gas that is inhaled