Echinodermata Vocabulary Terms

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Across
  1. 5. spherical or flattened bodies
  2. 6. cup-like calyx and feathery arms
  3. 9. spiny endoskeleton, radial symmetry
  4. 11. Threat to echinoderm populations
  5. 12. Hard plates
  6. 14. expels sticky threads or toxins
  7. 15. Cup-like structure
  8. 16. Hard plates
  9. 18. Sieve-like opening
  10. 19. graze on algae and detritus
Down
  1. 1. elongated bodies and leathery skin
  2. 2. Flexible, fluid-filled
  3. 3. filters plankton
  4. 4. disturbance
  5. 7. regrow lost body parts
  6. 8. five-fold radial symmetry
  7. 10. hydraulic system in echinoderms
  8. 13. central disc and long, slender arms
  9. 17. central disc and radiating arms