Respiratory system
Across
- 2. This is a muscle to breath
- 5. It is small tubes in the body
- 6. Airway of the body
- 9. To smell and to breath
- 10. very thin blood vessels
- 11. Gas that doesn't have any smell or taste
Down
- 1. Movement of molecules high concentration to low concentration
- 3. The place where breathing organ
- 4. bags/sacs of air
- 5. The tube of lung
- 7. It is bones of chest
- 8. Air that humans cannot breathe and that plants need