Across
- 2. tiny air sacs where oxygen and carbon dioxide are exchanged
- 4. bones that protect the vital organs heart and lungs
- 6. poisonous gas that stops oxygen from being carried effectively in the blood
- 9. the tube that carries air from the mouth/nose to the bronchi
- 10. an addictive chemical in cigarettes that makes smoking hard to stop
- 11. smaller air tubes inside the lungs that lead to the alveoli
Down
- 1. name of muscle between the ribs that help the chest expand and contract
- 3. sticky black substance in cigarette smoke that damages the lungs and alveoli
- 5. two tubes that branch from the trachea into each lung
- 7. a large muscle under the lungs that contract/relax to help you breathe in and out
- 8. organs where gas exchange happens