Echinoderms and Invertebrate Chordates

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Across
  1. 3. the phylum of animals that includes vertebrates
  2. 5. the larva of a sea star
  3. 9. having 2 sexes
  4. 10. the phylum of sea stars
  5. 12. the act of releasing sperm and egg into the water
  6. 14. the digestive glands
  7. 15. having 5 parts in the symmetry
  8. 19. the bony plates within the skin of echinoderms
  9. 20. a chordate characteristic that becomes the jaws and gills in some vertebrates; ___ pouches
  10. 22. the bulb which draws water into the tube feet
  11. 23. mouth is formed second
  12. 25. ___ groove; is the feeding organ of tunicates
  13. 28. the eye spot
  14. 29. one of the characteristics of chordates
Down
  1. 1. can reverse direction of blood flow
  2. 2. having both sexes on the same individual
  3. 4. the side of the sea star opposite the mouth
  4. 6. a chordate characteristic that becomes the vertebrae
  5. 7. the stomach of sea stars that is expelled through the mouth so that they can eat
  6. 8. the pincerlike appendages used for protection and cleaning
  7. 11. the class of sea stars
  8. 13. a cephalochordate that retains chordate characteristics throughout its life
  9. 16. members of subphylum Urochordata that contain the chordate characteristics only in the larval form
  10. 17. the nerve that extends down the arm of the sea star
  11. 18. a component of the tunic
  12. 21. calcium __ the component of the endoskeleton
  13. 24. how water gets into and out of the tunicates
  14. 26. the structure by which the starfish moves and catches prey
  15. 27. the opening through which water enters the vascular system