Across
- 5. major organ of the respiratory system
- 6. at the ends of the bronchioles where gas exchange occurs
- 8. muscle underneath the lungs
- 9. the voice box
- 10. small flap of tissue that covers the windpipe when you swallow food
Down
- 1. a windpipe that leads air to lungs
- 2. small tubes that branch off bronchi
- 3. tiny hairs that protect the nasal passageway
- 4. throat
- 7. the central passageway for air to enter the lungs