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