Across
- 2. main muscle for breathing
- 3. tube that carries air from the throat to the lungs
- 5. windpipe
- 9. smallest air passages in the lungs
Down
- 1. bacteria infection in the lungs
- 4. taking air into the lungs
- 6. tiny air sacs in the lungs
- 7. the voice box
- 8. breathing and vital for respiration