The Respiratory System

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Across
  1. 1. method to measure lung volumes
  2. 4. painful inflammation of the pleural tissue
  3. 5. detergent-like liquid in the airways
  4. 6. process of opening airways
Down
  1. 2. measurement of lung obstruction
  2. 3. partial pressure of carbon dioxide in the veins
  3. 7. cartilaginous tube that transports air