Respiratory System

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Across
  1. 6. tissue that lines the airways
  2. 9. specialized cells that produce mucus
  3. 10. air enters and is filtered
  4. 11. voice box, contains vocal cords
  5. 13. muscle that controls breathing
Down
  1. 1. gas ___ is a major function
  2. 2. tubes that carry air into the lungs
  3. 3. distributes air in the lungs
  4. 4. cells with tiny hair-like structures
  5. 5. tiny air sacs in the lungs
  6. 7. spongy organs used in breathing
  7. 8. ___ production is also a function
  8. 12. tube that transports air
  9. 14. passageway for air, throat