Invertebrates

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Across
  1. 3. has two shells
  2. 5. Has ~30 legs
  3. 7. Flatworms use these to detect light
  4. 9. sessile cnidaria body plan
  5. 10. Many nematodes are ______
  6. 13. Sponge phylum
  7. 17. symmetry where body parts are joined around a central axis
  8. 18. contains venom for stinging
  9. 22. mollusk's toothlike "tongue"
  10. 23. transferred by mosquito bites; cause Elephantiasis
  11. 24. skeletal system supported by water
  12. 25. opening through which water exits a sponge
Down
  1. 1. porifera breathe using ______
  2. 2. Has ~150 legs
  3. 4. Sponges are _____ feeders
  4. 6. The most advanced type of mollusk
  5. 8. Mollusks have ____ bodies
  6. 11. Fragmentation is a form of ______ reproduction
  7. 12. muscular feeding tube that extends through a flatworm's mouth
  8. 14. Common name for platyhelminthes
  9. 15. Symmetry where two sides are the same
  10. 16. Less advanced animals can reproduce this way
  11. 19. motile cnidaria body plan
  12. 20. Organ used for reproduction by annelids
  13. 21. Arthropods are ____-footed animals
  14. 26. Used by mollusks for propulsion