Body systems
Across
- 1. Bring blood to the heart
- 4. need these to fight off diseases
- 8. The hollow muscular organ forming an
- 9. Main digestive system organ
- 11. passage
- 12. This holds in urine
- 13. The basic unit of life
- 15. Main excretory system organ
Down
- 2. The tube that delivers your food to
- 3. Main circulatory system organ
- 5. A dome-shaped sheet of muscle
- 6. Main respiratory system organ
- 7. Take blood away from the heart
- 10. Your windpipe
- 14. Small finger-like surfaces in small