Across
- 5. Three protective membranes
- 6. Voice Box
- 10. space between lungs
- 12. Junction between the axon
- 13. largest organ in the body
- 14. specialized cell
- 15. Signals to organisms
Down
- 1. used to measure respiratory volumes
- 2. Tiny sacs of lung tissue
- 3. Major role in breathing
- 4. Neuron extension
- 7. Passageway for food
- 8. Two spongy organs
- 9. Branch like parts
- 11. Windpipe