Across
- 4. 2 main organs of the respiratory system that get filled with air.
- 5. Is the gas we release out.
- 7. Windpipe that carries air to lungs.
- 8. Is the gas we breathe in.
Down
- 1. Means breathe out.
- 2. ______System helps us breathe oxygen and release carbon dioxide.
- 3. A muscle that helps us breathe by moving up and down.
- 6. Means breathe in.
- 9. Where air is entered and cleaned