Across
- 3. The windpipe; a tube that carries air to the lungs.
- 5. The throat; a passageway for air and food.
- 7. The process of breathing; the exchange of oxygen and carbon dioxide between an organism and its environment.
Down
- 1. Small air tubes in the lungs that branch off from the bronchi.
- 2. The voice box; a structure in the throat containing the vocal cords.
- 4. The two main air tubes that branch off from the trachea and lead to the lungs.
- 6. Tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged.