Across
- 1. Passageway leading from pharynx to lungs. Conducts air from pharynx to lungs.
- 8. Found in the form of rings, they support the trachea, preventing it from collapsing.
- 9. Connects mouth and nasal cavity to the larynx and esophagus. Collects incoming air from nose and mouth, passing it to the trachea.
- 10. A flap-like structure that prevents food from entering the trachea
- 12. Conducts air into the nasal cavity
- 13. Warms incoming air to prevent damage to lung tissue. Hairs lining the cavity filter the air of unwanted debris.
- 15. Tiny air pockets that are the site of gas exchange.
Down
- 2. Small blood vessels that surround the alveoli, carrying away oxygen and “dropping off” carbon dioxide
- 3. Passageways that branch from the bronchi into the lobes of the lung. They subdivide into smaller and smaller tubes.
- 4. A muscle layer at the bottom of the thoracic cavity that contributes to inspiration and expiration (breathing).
- 5. Catches and holds onto dust, germs and other unwanted material.
- 6. Tiny hairs that line the respiratory tract. They have wave-like motion, moving mucus upward and out to the throat where it is swallowed or coughed up.
- 7. Contains the vocal cords.
- 11. Passageway that branches from the trachea into the lungs. There is one bronchus per lung.
- 14. A respiratory surface contained within the body of an animal, but connected to the outside air by passageways.