Comparing Animal Body Systems

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Across
  1. 5. All of them have an external skeleton called exoskeleton.
  2. 6. Collects and processes information (two words).
  3. 8. They do not have mouths (two words).
  4. 11. We can call them nematodes as well.
  5. 12. Takes in oxygen and releases carbon dioxide (two words).
  6. 13. Is in charge of breaking down the food that the body uses as energy (two words).
  7. 15. Snails, slugs, squids, octopuses and nautiluses are part of this phylum.
Down
  1. 1. In charge of removing wastes from the body (two words).
  2. 2. They do not have specialized circulatory, respiratory or skeletal systems.
  3. 3. They only have one body opening.
  4. 4. Carries oxygen, water and nutrients to all the cells of the body (two words).
  5. 7. Many of them have five - parts around a central point.
  6. 9. All of them have a right and left side that are mirror images of each other.
  7. 10. It provides internal and external movement for an animal (two words).
  8. 14. They have a body filled with fluid.