Respiratory System - "Breathing"

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Across
  1. 5. also known as "windpipe"
  2. 8. process in which air is forced into the lungs
  3. 11. back of the throat region where both air and swallowed food may pass across
  4. 12. two of these branch from the "windpipe" into each of your lungs (plural term)
  5. 13. (singular) site of gaseous exchange
  6. 15. the contraction and relaxation of this set of muscles brings about the movement of the ribcage
  7. 17. while breathing out, ribcage moves inward & _____
Down
  1. 1. flatten sheet of muscle; it contracts when you breathe in & relaxes when you breathe out
  2. 2. type of cell that produces mucus
  3. 3. process in which air is forced out of the lungs
  4. 4. another term to describe "breathing"
  5. 6. found on epithelial cells in your airways that function to sweep mucus and dust out of the airways
  6. 7. vocal cords are found here
  7. 9. while breathing in, ribcage moves upward & _____
  8. 10. (plural) site of gaseous exchange
  9. 11. differences in air ______, determine the direction in which air moves
  10. 14. also known as the chest cavity
  11. 16. volume of this organ changes during "breathing"