Marine Worms

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Across
  1. 3. Roundworms have ________ fertilization.
  2. 8. Roundworms mostly live in ________ zones?
  3. 9. Which marine worm is without bristles, is in the class Hirudinea, some are free-living, and some are parasitic, and the parasites attach by two suckers?
  4. 10. Ribbon worms have ________ bodies?
  5. 13. A characteristic of the digestion type of ribbon worms is ________?
  6. 14. A sharp organ used by ribbon worms to spear prey is the ________?
  7. 15. The middle cell layer in a flatworm is?
  8. 18. Which marine worm has no circulatory or respiratory system and moves by muscular contractions and cilia movement?
  9. 19. Bloodworms have an ________ circulatory system.
  10. 20. Which marine worm belongs to Class Polychaete, which means “Many Bristles”?
  11. 21. What phylum name means “Bristle Jaw”?
  12. 24. The type of symmetry that marine worms have is ________ symmetry.
  13. 25. Flatworms do Asexual reproduction by ________.
Down
  1. 1. The inner cell layer in a flatworm is?
  2. 2. Muscles that contract to make a worm short are ________ muscles.
  3. 4. A worm's nerve cell clusters that act like a brain are the _________?
  4. 5. A red rash caused by Fluke larvae is ________?
  5. 6. Planaria have a mouth on the ________ surface of the body.
  6. 7. Platyhelminthes means ________?
  7. 11. Roundworms have ________ development.
  8. 12. Ribbon worms are the largest, ________ worm in the ocean.
  9. 16. The outer cell layer in a flatworm is?
  10. 17. What lives on or in a living host from which it gets its nutrition?
  11. 22. Roundworms are a part of the phylum ________?
  12. 23. Which phylum name means “Little Rings”?