human body system

4. Cord: This structure is part of the central nervous system, transmitting signals between the brain and the rest of the body
6. These organs absorb nutrients from digested food.
9. This system defends the body against pathogens.
10. This system is responsible for the continuation of the species.
11. This organ is part of the digestive system, churning and breaking down food.
13. These are the rigid structures that make up the skeletal system.
15. This organ pumps blood throughout the body.
16. This system is the body's control center, responsible for communication.
18. This organ filters blood and produces bile.
19. This fluid carries oxygen, nutrients, and other substances throughout the body.
20. This system breaks down food for energy and nutrients.
22. This system helps cleanse and return tissue fluid.
23. This system provides the body's framework and support.
24. These organs facilitate gas exchange in the respiratory system.

1. This system produces hormones.
2. This system enables movement.
3. These are the tissues that contract and relax to produce movement.
5. These organs filter waste from the blood and produce urine.
6. This system is the body's outer covering, providing protection.
7. This organ is the control center of the nervous system.
8. These are chemical messengers produced by the endocrine system.
12. This system is responsible for transporting substances throughout the body.
14. This system eliminates waste products.
17. This system facilitates gas exchange (oxygen and carbon dioxide).
21. These are proteins that speed up chemical reactions in the body.