Across
- 6. Tiny blood vessels that surround the alveoli to help with gas exchange.
- 7. The function of the respiratory system is to supply the body with _____ and remove carbon dioxide
- 8. The muscle that is responsible for helping us breathe by creating a vacuum.
- 9. Oxygen enters the body through the nose and ______.
- 10. Carry air from the bronchial tubes to the alveoli.
Down
- 1. Tiny sacs where the exchange of oxygen and carbon dioxide takes place.
- 2. The two tubes that branch from the trachea into the lungs.
- 3. When the diaphragm relaxes, _________ is forced out of the lungs.
- 4. The windpipe.
- 5. The main organ of the respiratory system.