Phylum Echinodermata

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Across
  1. 4. internal skeleton
  2. 5. circulatory sys where blood leaves the vessels
  3. 6. class of sea cucumbers
  4. 8. phylum meaning spiny skin
  5. 10. class of brittle stars
  6. 13. bony plate make of calcium carbonate
  7. 14. canal of water vascular system encircling mouth
  8. 15. canal that connects madreporite to ring canal
  9. 16. class of sea stars
  10. 18. arms that come from the central disk
  11. 19. opening of water vascular system
  12. 20. outmost layer of skin
Down
  1. 1. means self cut, able to drop a body part
  2. 2. class of sea daisies
  3. 3. class of sea urchins and sand dollars
  4. 7. small pincer-like spines, clean epidermis
  5. 9. class of sea lilies and feather stars
  6. 11. seperate male and female sexes
  7. 12. bulb-like top of tube feet
  8. 17. ability to regrow missing body parts