Across
- 2. The basic unit of life.
- 3. The control center of the nervous system.
- 4. Proteins produced by the immune system to fight off infection.
- 6. Proteins that speed up chemical reactions.
- 8. This system breaks down food for nutrient absorption.
- 11. cord: A bundle of nerves that carries messages to and from the brain.
- 12. Chemical messengers produced by the endocrine glands.
- 13. A structure composed of different tissues working together.
- 15. This system enables the continuation of the species.
- 16. This system is involved in immunity and fluid balance.
- 18. This system filters waste and regulates fluid balance.
- 21. This system provides support and structure, composed of bones and cartilage.
- 22. A blood vessel that carries blood towards the heart.
- 23. This system circulates blood, delivering oxygen and nutrients.
- 24. This system is the body's outer covering, including skin, hair, and nails.
Down
- 1. The chemical processes that occur within a living organism.
- 5. This system facilitates gas exchange (oxygen and carbon dioxide).
- 6. This system regulates bodily functions through hormones.
- 7. The body's ability to maintain a stable internal environment.
- 9. A group of similar cells performing a specific function.
- 10. A fluid that carries oxygen, nutrients, and waste products.
- 14. This system enables movement, made up of skeletal, smooth, and cardiac muscles.
- 17. A tiny blood vessel where exchange of substances occurs.
- 19. A blood vessel that carries blood away from the heart.
- 20. This system controls and coordinates bodily functions through electrical and chemical signals.