Respiratory System

12345678910111213
Across
  1. 5. Tubes that branch off from the trachea and carry air into the lungs
  2. 6. The process of breathing in oxygen and breathing out carbon dioxide
  3. 9. The gas we breathe in to stay alive
  4. 12. Where oxygen moves after leaving the lungs
  5. 13. Breathing in
Down
  1. 1. A tube also called the windpipe
  2. 2. The special job or purpose of something
  3. 3. The voice box that helps you speak
  4. 4. The dome-shaped muscle under the lungs that helps you breathe
  5. 7. Breathing out
  6. 8. The gas we breathe out
  7. 10. Where air is filtered, warmed, and moistened
  8. 11. Tiny air sacs where oxygen and carbon dioxide are exchanged