RESPIRATORY SYSTEM

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Across
  1. 5. The windpipe, a tube that carries air to the lungs.
  2. 6. The primary organ for gas exchange in the respiratory system.
  3. 8. The process of taking air into the lungs
  4. 10. The two branches of the trachea that lead to the lungs.
  5. 12. A flap of cartilage that prevents food from entering the windpipe.
  6. 13. Waste product of cellular respiration, exhaled from the lungs.
  7. 14. The process of breathing out.
Down
  1. 1. The process of taking air into the lungs
  2. 2. The voice box, containing the vocal cords.
  3. 3. A region behind the nose that leads to the throat. (
  4. 4. The gas inhaled into the lungs.
  5. 7. Tiny air sacs in the lungs where gas exchange occurs.
  6. 9. The muscle that helps with breathing by moving up and down.
  7. 11. The process of breathing in.