Human Body Systems

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Across
  1. 3. a messenger system that uses hormones to carry out specific functions
  2. 5. part of the digestive and endocrine systems
  3. 7. system that coordinates actions and sensory information
  4. 10. the type of muscle in the stomach and bladder
  5. 11. these carry blood away from the heart
  6. 14. basic unit of the nervous system
  7. 15. the system that removes waste
  8. 16. small blood vessels
  9. 19. part of the central nervous system
  10. 20. the type of muscle in the heart
  11. 21. the system that breaks down food
Down
  1. 1. the parts of food used by the body to grow and survive
  2. 2. connects the kidney to the bladder
  3. 4. a measure of the amount of energy in food
  4. 6. this describes the inner layer of bone
  5. 8. the system that protects body and stores calcium
  6. 9. produces urea by breaking down proteins
  7. 12. steady internal conditions when external conditions change
  8. 13. signal molecule released by organs of the endocrine system
  9. 17. the name for the hard, outer layer of bone
  10. 18. connects the pharynx to the bronchi