Across
- 1. the "engine" that maintains breathing
- 5. an element we exhale
- 6. large airways that allow air in and out of our lungs
- 8. a system of organs and tissues that helps you breathe
Down
- 2. the process of breathing
- 3. 2 holes that act as doors to help breathing
- 4. an element we inhale
- 7. a cage made out of bones that help protect your organs