Animals

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Across
  1. 1. A structure in a sponge that protects the sponge
  2. 4. The building block of life. All living organisms have these
  3. 6. A type of mollusk with tentacles
  4. 8. An organism without a spine
  5. 10. Moves water through a sponge and traps food
  6. 11. A group of similar cells working together for the same function
  7. 12. A group of organs working together for the same function
  8. 13. A part of the water vascular system in an echinoderm. Responsible for movement
  9. 14. A type of mollusk with two external shells
  10. 15. An invertebrate with no tissues. Filter feeder.
  11. 16. A type of organism that breaks down dead organisms and transforms them into material that can be used by others
  12. 23. A type mollusk with a single, external shell
  13. 24. A scavenger flatworm
  14. 25. An entrance for water in a sponge
Down
  1. 1. An organism that feeds on dead animals
  2. 2. A cell in a sponge that digests food
  3. 3. A type of worm made up of linked segments
  4. 5. An organism with a spine
  5. 7. invertebrates with soft, unsegmented bodies
  6. 9. An organism that feeds on live animals
  7. 10. An invertebrate with stinging cells and a mouth
  8. 11. A parasite flatworm
  9. 17. An invertebrate with an internal skeleton and a water vascular system
  10. 18. A type of worm with a digestive system and no segments
  11. 19. A type of cnidarian with a bowl shape and a mouth on the bottom
  12. 20. A group of similar tissues working together for the same function
  13. 21. A type of cnidarian with a vase shape and a mouth on the top
  14. 22. An organ that moves oxygen from the water into an animal's blood