Respiratory

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Across
  1. 3. term for just the movement of air
  2. 5. no energy required for exchange of nutrients
  3. 6. part of membrane that lines an organ
  4. 9. part of a membrane that lines a cavity wall
  5. 10. detergent that keeps the air sacs open
  6. 11. diaphragm contracts during this
  7. 12. humidify the air when you breathe
  8. 13. true gas exchange happens here
Down
  1. 1. muscles relax to reset for next breath
  2. 2. term for when gases in the body release
  3. 4. protects the respiratory tract during swallowing
  4. 7. this muscle contracts to increase lung volume
  5. 8. process of delivering essential nutrients to tissues and organs