Respiratory System!

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Across
  1. 2. – The throat; passageway for both air and food.
  2. 5. – Element in the gas that is exhaled as a waste product.
  3. 8. – Double-layered membrane surrounding each lung.
  4. 9. – The act of pushing air out of the lungs.
  5. 13. – Flap that covers the trachea during swallowing.
  6. 16. – Structure containing the vocal cords; the “voice box.”
  7. 18. – Protein in red blood cells that carries oxygen.
  8. 19. – Tiny hairlike structures that move mucus out of the airways.
  9. 20. – The act of taking air into the lungs.
Down
  1. 1. – The “windpipe” that connects the larynx to the bronchi.
  2. 3. – Microscopic blood vessels where gas exchange occurs with alveoli.
  3. 4. – The two main airways that branch from the trachea into the lungs.
  4. 6. – The overall process of gas exchange in the body.
  5. 7. – The mechanical process of moving air in and out of the lungs.
  6. 10. – Gas inhaled and transported by red blood cells to tissues.
  7. 11. – Pair of organs responsible for breathing.
  8. 12. – The movement of gases from high to low concentration in the lungs.
  9. 14. – Dome-shaped muscle that contracts during inhalation.
  10. 15. – Smaller airways branching off from the bronchi.
  11. 17. – Tiny air sacs in the lungs where gas exchange occurs.