Body Systems and Homeostasis

6. composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts
11. delivers oxygen and nutrients to cells and takes away wastes
12. blood vessels located throughout your body
14. made up of all the body's different hormones
15. made up of the bones that give structure to the human body
16. chemical substances that act like messenger molecules in the body
18. all the different systems in a human
19. the system you use to eat
20. includes the brain, spinal cord, and a complex network of nerves

1. any self-regulating process by which biological systems tend to maintain stability
2. a major part of the circulatory system
3. digestion where your body breaks large food molecules down into their chemical building blocks
4. The smallest type of blood vessel
5. composed of many fibrils, packaged into orderly units
7. includes organs that facilitate the removal of nitrogenous wastes from the body
8. composed of specialized cells called muscle fibers
9. An organ that makes one or more substances, such as hormones
10. the system you use to reproduce
13. includes the nose, mouth, throat, voice box, windpipe, and lungs.
17. digestion where your body mechanically breaks down food, grinding or smashing it into smaller pieces