Across
- 4. there are 2 that branch off from the trachea
- 8. 3 lobes
- 9. smaller and 2 lobes
- 11. also known as the throat
- 12. gas we breathe in
Down
- 1. waste product that we exhale
- 2. muscle that contracts when we inhale & exhale
- 3. also known as windpipe
- 5. we have 600 million of these
- 6. also known as the voice box
- 7. color of healthy lungs
- 10. only organ that can float on water