Across
- 1. Tube that carries air from the larynx to the bronchi
- 3. Process where the diaphragm relaxes and air leaves the lungs
- 5. Movement of gas particles from high to low concentration
- 8. Site of gas exchange, have very thin walls
- 9. muscles Muscles between ribs that help expand and contract the chest
- 10. Flap that prevents food from entering the airway
Down
- 2. Tiny blood vessels surrounding alveoli
- 4. Triggered by too much CO2 in our blood
- 5. Contracts during inhalation, causes lungs to inflate
- 6. Smaller air passages that lead to the alveoli
- 7. Bones that protect our internal organs