Nervous, Endocrine, Circulatory, Respiratory, Skeletal, Muscular

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Across
  1. 2. major organ of the circulatory system
  2. 4. a chemical compound produced by glands
  3. 7. the gas that we breathe in
  4. 9. this system pumps blood around the body to transport nutrients, water, CO2 and O2
  5. 10. the body system that controls and communicates with all other systems
  6. 11. a change in an organism’s environment that causes a reaction
  7. 12. another word for breathing
  8. 13. major organs of the endocrine system
  9. 16. this body system provides strength, balance and warmth; allows the body to move
Down
  1. 1. the waste product we breathe out
  2. 2. the process of an organism's internal environment being kept stable in spite of external changes.
  3. 3. this body system speeds up or slows down body processes by releasing hormones into the bloodstream
  4. 5. an action or change in behavior due to a stimulus
  5. 6. the three types of muscles are skeletal, smooth and ______.
  6. 8. major organ of the respiratory system
  7. 14. this body system protects and holds organs in place; provides structural support and produces new red blood cells
  8. 15. major organ of the nervous system