Across
- 2. Sends signals to and from the brain
- 5. Filters waste from the blood
- 7. System that fights infections
- 8. Pumps blood throughout the body
- 9. The body's largest organ
Down
- 1. The body system that moves bones
- 3. Protects organs and provides structure
- 4. The system responsible for breathing
- 6. The system that helps you digest food