Across
- 2. – Muscle under lungs that contracts to help breathe in and out.
- 4. – Smaller tubes inside the lungs carrying air to alveoli.
- 6. – Tiny air sacs where oxygen enters the blood and carbon dioxide leaves.
- 9. – Passage connecting nose/mouth to the larynx.
- 11. – Sticky substance that traps dust, germs, and particles.
- 12. – Entry for air; filters, warms, and moistens it.
Down
- 1. – Tube carrying air from the larynx to the bronchi; lined with cilia.
- 3. – Tiny hairs in trachea/bronchi that sweep out dust and germs.
- 4. – Two main branches leading air into each lung.
- 5. – Directs air into the trachea and contains vocal cords.
- 7. – Organs holding bronchi, bronchioles, and alveoli; expand to move air.
- 8. – Flap that stops food entering the trachea when swallowing.
- 10. – Secondary entry for air, especially when breathing hard.