Across
- 3. The windpipe that connects the throat to the bronchi.
- 4. Dioxide The waste gas removed from the body when you breathe out.
- 8. Exchange The movement of oxygen and carbon dioxide between the lungs and blood.
- 9. The two main organs where gas exchange occurs.
- 10. The process of breathing air out of the lungs.
- 11. The large tubes that branch off from the trachea into each lung.
- 12. The tiny air sacs where gas exchange happens.
Down
- 1. Smaller branches that come off the bronchi.
- 2. The muscle under the lungs that helps you breathe.
- 5. The process of breathing air into the lungs.
- 6. The gas your body needs for cellular respiration.
- 7. The tiny blood vessels surrounding the alveoli.