Respiratory System

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Across
  1. 3. The windpipe that is lined with mucus and cilia to trap particles
  2. 7. Tubes that carry air closer to the site of external respiration
  3. 9. The voice box that contains the vocal cords
  4. 10. A tiny air sacs through which gas exchange take place
Down
  1. 1. Right and left airway passages closest to the trachea
  2. 2. The gas that is exhaled out of the lungs.
  3. 4. A single breath inhaled and exhaled.
  4. 5. A tiny blood vessel through which gas exchange takes place.
  5. 6. done shaped muscle that causes the chest cavity to expand and contract
  6. 8. Gas used by the body to metabolize food for energy.