Across
- 1. _____ cancer is responsible for the most cancer deaths in the world.
- 6. _____ system is a system of tissues and organs that contains the lungs.
- 7. The respiratory system helps you _____.
- 8. People with asthma use bronchodilators, also known as _____.
Down
- 2. The _____ exhange is crucial for life.
- 3. In order to prevent lung damage, don't _____.
- 4. The lungs are the only organ that can float on _____.
- 5. _____ smoke can narrow air passages, cause inflammation in the lungs, and is the leading cause of lung cancer and COPD.
- 6. The lungs are protected by the _____.