The Internal World

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Across
  1. 2. group of similar cells that work together to perform a specific function
  2. 5. maintaining a stable internal environment
  3. 11. system that provides movement
  4. 12. largest part of brain
  5. 13. responsible for transmitting and receiving stimuli
  6. 14. transport of nutrients to the body
  7. 16. front side of the body
  8. 17. larger bone in the lower leg, known as the "shin bone"
  9. 19. responsible for filtering waste
  10. 20. organ that secretes chemical substances for the body
Down
  1. 1. muscles on the front of the thigh
  2. 3. system that breaks down food
  3. 4. back side of the body
  4. 6. layer of tissue on the outside of a persons body
  5. 7. system that fights off invaders
  6. 8. organ that pumps blood for the body
  7. 9. smallest living unit of life
  8. 10. tiny air sacs in the lungs
  9. 15. chemical reactions that convert food into energy
  10. 18. system that provides framework and protection to the body