Echinoderms

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Across
  1. 1. used by Ophiuroidea for respiration
  2. 5. the clade containing sea cucumbers
  3. 8. the opening of the water vascular system
  4. 9. skin gills sea stars use for gas exchange
  5. 10. connects the madreporite and ring canal
  6. 12. the clade containing brittle and basket stars
  7. 14. sea star digestion is (external/internal)
  8. 15. what echinoderms have instead of cephalization
  9. 16. the clade containing sea lillies and feather stars
  10. 17. the clade containing sand dollars and sea urchins
Down
  1. 2. echinoderms have (blank) penta-radial symmetry
  2. 3. the clade containing sea stars
  3. 4. the type of symmetry echinoderms have as larvae
  4. 6. squeeze water into the tube feet for locomotion
  5. 7. the shell made of fused ossicles seen in Echinoidea
  6. 11. the stomach closest to the oral surface in sea stars
  7. 13. the surface of the sea star away from the mouth