Across
- 4. attacks pathogens
- 5. exchanges oxygen and CO2
- 6. transports nutrients
- 7. produce their own food
- 10. breaks down food
- 12. regulates body temperature
Down
- 1. helps the body move
- 2. holds organs in place
- 3. eats other organisms
- 8. filters blood
- 9. one parent
- 11. two parents