Across
- 1. The voice box that produces sound
- 4. Small branches of the bronchi that carry air to alveoli
- 5. The windpipe that carries air to the bronchi
- 7. Two large tubes that branch from the trachea into the lungs
- 8. The throat, passage for air and food
Down
- 2. The system responsible for breathing
- 3. Tiny air sacs in the lungs where gas exchange occurs
- 6. Muscle that contracts to help lungs expand