Animal invertebrates

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Across
  1. 2. head
  2. 7. Having backbones
  3. 8. jellylike middle sponge layer
  4. 11. Identical halves any way cut
  5. 13. attached Cnidarian
  6. 15. identical halves cut in middle
  7. 16. masses of nerve cell bodies
  8. 17. free swimming cnidarian with a bell shaped body & tentacles
  9. 18. outside protective cells
  10. 20. organ producing sperm
  11. 21. Having identical parts
  12. 22. capsule containing toxin to inject prey with toxin
  13. 23. ability to regrow a body part
  14. 26. sponge flagellated cells pushing water thru
Down
  1. 1. No backbone
  2. 3. single shelled animal
  3. 4. egg producing organ
  4. 5. cluster of cells encased in a hard, spicule-reinforced shell
  5. 6. having both genders reproductive organs
  6. 8. jellylike substance separating epithelial cells in cnidarians
  7. 9. cells sensing & responding to environment
  8. 10. two shelled animal
  9. 12. blood flow system
  10. 14. identical halves cut longway
  11. 19. cells using pseudopods performing different functions in different animals
  12. 24. animal tissue with free & attached surfaces
  13. 25. tail