Across
- 1. the tube that connects mouth and lungs
- 4. the trachea is dividad into 2 ...
- 6. muscle that helps us to breathe, under the lungs
- 7. the action of "take in air"
Down
- 2. the exchange of gases happens here
- 3. the gas we need to live
- 5. small blod vessels that carries oxygen and carbon dioxide