Across
- 3. large muscle that contracts and relaxes to help with breathing
- 5. contain alveoli that help you breath
- 7. Windpipe (tube that allows air into the lungs)
- 8. The system that the respiratory system works closely with
- 9. small grape-like structures that are the site of gas exchange
Down
- 1. flap of tissue that opens and closes for breathing and eating
- 2. disease caused by the deterioration of the alveoli
- 4. disease that makes it hard to breathe after exercising
- 6. Voicebox