Body systems

2. a group of cells or an organ that secretes a substance
3. a soft tissue in the center of some bones
5. tiny blood vessels that connect veins and arteries to the body's cells
7. a system that consists of organs that supply the body with constant oxygen and rid the body of carbon dioxide
10. muscles that enable you to move
13. the system that deals Witt the actions you don't control
15. the division of the nervous system that includes the nerves that connect the CNS to all parts of the body
16. the type of respiration that is the exchange of oxygen and carbon dioxide between the blood and the air in the lungs
17. the process of removing wastes from the body
19. the system that is part of the nervous system that deals with the actions you control
20. blood vessels that move blood to the heart
21. the type of respiration that is the exchange of gases between the blood and cells of the body
22. specialized nerve cells

1. the division of the nervous system that includes the brain and spinal cord
4. a system that allows your body to move
5. a group of organs and tissues that move essential supplies to the body's cells and removes their waste product
6. the system that converts fuel (food) into usable energy
8. muscles found in organs, blood vessels, and glands
9. the process of changing food into material the body can use
11. the system that is the bodies waste removal center
12. muscles only found in the walls of your heart
14. any vessels that move blood away from the heart
17. the system that is the chemical communication system that contorls many body functions
18. the system that is your body's message and control center