Across
- 4. an organ that filters the blood
- 6. a bone that protects the brain
- 9. this system provides structure and protection
- 12. a body system that allows humans to reproduce
- 13. a body system that breaks down food
- 14. this organ makes hormones that regulate blood sugar levels
- 16. This system keeps you safe from antigens
Down
- 1. includes skin, nails, and glands
- 2. this system releases hormones
- 3. an organ that helps us to see
- 5. an organ that helps you breath
- 7. a system that consists of the heart, veins, and blood
- 8. sits in the middle of the chest on the left
- 10. largest organ
- 11. The most complex organ in the human body
- 15. bones that protect the heart