Across
- 4. The system of the way someone breathes
- 6. The larynx is between the throat and this
- 7. Theses are tiny balloon-like clusters located at the smallest air passage within the lungs
- 8. The tube between the throat and the trachea
- 9. Where air enters the body mainly
Down
- 1. This flattens down when the respiratory centre signals the chest muscles to contract
- 2. Another word for the throat
- 3. The two main breathing organs
- 4. An area in the brain that controlles breathing
- 5. Airtight skin that surronds and cushions the lungs