Body Systems

1. The essential part of the nervous system that regulates most of the body.
3. An organ in the excretory system that helps break down food into smaller pieces and particles.
7. A system that is made of sensory organs and that our body uses to understand its environment.
9. What makes up the skeletal system.
12. Attached to the stomach. Extracts energy and food and helps carry excrement out of the body.
13. A part of the reproductive system that is usually found only in males.
14. A hormone that regulates the female reproductive system.
15. The part of the circulatory system that pumps blood throughout the body.
16. An organ that makes proteins and helps detoxify the body. Part of the excretory system.

2. ______________ System. A system that the body needs to fight pathogens.
4. A hormone that regulates the male reproductive system.
5. Produces essential hormones for the body. Part of the excretory system.
6. A body system that is attached to the skeletal system and helps move the skeleton.
8. A part of the reproductive system that is usually found only in females.
10. Molecules in food that an organism needs survive and grow.
11. Forces air in and out of our body. Part of the respiratory system.
14. A protein that the body uses to help in chemical reactions. Used in the digestive system.