Across
- 3. Blood vessels that carry blood away from the heart.
- 5. Body system that supports and protects the body with bones.
- 6. Chemical messengers released by glands.
- 7. System that moves blood through the body.
- 8. Organ that produces and releases substances like hormones.
- 10. Maintaining a stable internal environment.
- 12. System that removes wastes from the body.
- 13. System responsible for breathing and gas exchange.
- 14. Tissue that contracts to create movement.
- 16. Tiny vessels where oxygen and nutrients are exchanged.
- 17. Blood vessels that carry blood back to the heart.
- 19. System that releases hormones into the blood.
- 20. Enzymes breaking food down into nutrients.
Down
- 1. responsible for producing offspring.
- 2. System that allows movement using muscles.
- 4. Breaking food into smaller pieces without chemicals.
- 9. The body controlling and balancing its functions.
- 11. System that sends signals through nerves and the brain.
- 15. System that breaks down food for nutrients.
- 18. Long cells that make up muscles.