human body systems

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Across
  1. 2. long tube where most of nutrient molecules are absorbed
  2. 4. supply cells with oxygen and nutrients they need to stay alive
  3. 5. produces bile which dissolves fat
  4. 7. acts as a barrier between you and the outside world
  5. 8. controls and coordinates everything in the body
  6. 9. the controls center of the nervous system,and the whole body
  7. 10. removal of waste from the cells and body
  8. 12. stores bile before entering small intestine
  9. 16. to make egg and sperm cells
  10. 17. protects the organs
  11. 19. contracts,pushing food in to the stomach
  12. 20. beat to send blood to the body
Down
  1. 1. allow organ and bones of the body to move
  2. 3. removes water from undigested food material
  3. 6. exchange of oxygen and carbon dioxide between the blood,air and tissues
  4. 11. hormone producing cells and glands
  5. 13. secretes hornones to control blood suger (insuling)
  6. 14. converts food into simpler molecules that can be use by the cells of the body
  7. 15. excrete carbon dioxide
  8. 18. breakdown of food mechanically and chemically with enzymes