Respiratory System Crossword

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Across
  1. 2. _______ is essential for the survival of living cells
  2. 3. Air enters the body through the ____________
  3. 5. The waste product exhausted from the lungs
  4. 7. Interruption of normal breathing will result in _______
  5. 8. An artificial airway
  6. 11. The process of propelling inhaled particles upward to be swallowed
  7. 13. The process by which O2 and CO2 exchange
  8. 14. When the diaphragm contracts, air is drawn ____
  9. 15. Air travels under this to get to the larynx
  10. 16. Blood vessels ______ the air you breath in
  11. 17. The trachea branches of into a left and right _______
  12. 18. Your brain triggers your body to take a _______ when CO2 levels rise
  13. 19. The name of the space between the visceral and parietal pleura
Down
  1. 1. The exchange of O2 and CO2 at the cellular level
  2. 4. Another name for the trachea
  3. 6. The right lung has three, the left lung has two
  4. 9. Tiny hairs that trap particles and prevent them from entering the lungs
  5. 10. Grapelike clusters of air sacs
  6. 12. The name of the pleura membrane that encloses each lung
  7. 13. The main breathing muscle