Vocab words

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Across
  1. 6. animals that eat both plants and animals
  2. 7. tissue that is more flexible that bone
  3. 9. nerve cells that carry response information to muscles and other organs
  4. 11. a signal that causes an animal to react
  5. 12. how information travels in a nerve cell
  6. 13. animals that only plants
  7. 15. an organized grouping of neurons with bilateral symmetry
  8. 16. nerve cell with unique structure receiving and passing on information
  9. 18. is an internal gas filled sac
Down
  1. 1. nerve cells that detect stimuli
  2. 2. animals that strain their food from water
  3. 3. a system of fluid-filled tubes
  4. 4. where two or more parts of a skeleton meet
  5. 5. process that breaks down food into small molecules
  6. 7. animals that only eat other animals
  7. 8. nerve cells that pass information between neurons
  8. 9. when arthropods must shed their exoskeletons and produce new ones
  9. 10. an animals reaction to a stimulus
  10. 14. receives information from the environment and coordinates a response
  11. 17. tissue that contract or relax to create movement