Across
- 3. system — heart and blood vessels that move blood and nutrients.
- 5. — the body’s way of keeping internal conditions stable.
- 7. — organs that work together to perform major functions (e.g., digestive system).
- 11. — a group of similar cells that work together.
- 12. system — brain, spinal cord, and nerves that control the body.
- 14. — organs that bring in oxygen and remove carbon dioxide.
- 16. — an automatic, quick response to a stimulus (like pulling away from something hot).
- 17. system — organs involved in breathing.
- 18. system — organs that break down food and absorb nutrients.
- 19. — a germ (like a virus or bacteria) that can cause disease.
Down
- 1. — organ that pumps blood throughout the body.
- 2. — organ that controls thinking and body functions.
- 4. system — cells and organs that protect the body from germs.
- 6. system — muscles that enable movement.
- 8. — organ that filters waste from the blood and makes urine.
- 9. — a substance the body needs from food for energy and growth.
- 10. — the smallest unit of life.
- 13. — a body part made of tissues that has a specific job (e.g., heart).
- 15. system — bones and joints that support and protect the body.
- 20. — chemical messenger released by glands that controls body processes.