Across
- 3. It's a blood cell that fights off disease
- 7. Tiny air sacs at the end of bronchioles.
- 10. Multiple tissues make…
- 11. The system that brings oxygen in and gets rid of carbon dioxide.
- 12. Where the digestion system begins.
- 13. Multiple cells together make…
- 14. Stores urine
- 15. Filters blood to get through the excretory system.
Down
- 1. It directs air to the lungs
- 2. In the small intestine where digested food is absorbed.
- 4. Connects the mouth to the stomach
- 5. The main thing that helps us breathe in the respiratory system
- 6. It absorbs water
- 8. The most important organ in the respiratory system
- 9. Multiple organs together make…