Across
- 3. windpipe connecting throat to bronchi
- 6. addictive chemical in cigarettes/vapes
- 7. device measuring lung volume
- 8. tiny air sacs where gas exchange occurs
- 9. small branches leading to alveoli
- 10. flap preventing food entering trachea
Down
- 1. process of breathing in air
- 2. sticky substance that traps dust and germs in the lungs
- 4. infection inflaming lung air sacs
- 5. muscle that contracts during inhalation