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