Across
- 6. Carbon _______.
- 7. They expand when you inhale.
- 8. Connects the bronchus to the alveoli.
- 9. Were the oxygen enters your body.
- 11. Blood vessels in the wall of the alveoli.
Down
- 1. The _______ exchanges oxygen and carbon dioxide in the blood.
- 2. The process of exchanging the oxygen and carbon dioxide in the blood.
- 3. The muscle that inflates and deflates the lungs.
- 4. It separates the air to go into each lung.
- 5. Sends air to the lungs
- 10. The most important fuel for the cells.