Respiratory System

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Across
  1. 2. Every cell in our body needs a constant supply of this
  2. 4. Tiny air sacs with extremely thin walls
  3. 5. The process in which the body takes in oxygen and removes carbon dioxide
  4. 6. Common passage for air to the trachea
  5. 7. Air movement from the atmosphere into the lungs
  6. 8. Exhaled when oxygen is inhaled
  7. 11. Microscopic hairs covering the inner lining of air passages
  8. 13. Tiny vessels carrying blood
  9. 14. Located between the pharynx and the trachea
  10. 15. Hollow tube strengthened and kept open by rings of cartilage
Down
  1. 1. Split in two that lead to the right and left lungs
  2. 3. Air movement from the lungs to the atmosphere
  3. 5. Facilitates the exchange of gases between the air and our blood
  4. 9. A number of tiny branches within each lung
  5. 10. Dome-shaped muscle at the base of the lungs
  6. 12. The process that moves air in and out of the lungs