Marine Worms

2. Roundworms have ________ fertilization.
5. Ribbon worms are the largest, ________ worm in the ocean.
8. A characteristic of the digestion type of ribbon worms is ________?
9. The middle cell layer in a flatworm is?
12. A worm's nerve cell clusters that act like a brain are the _________?
15. A red rash caused by Fluke larvae is ________?
17. 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?
18. Ribbon worms have ________ bodies?
19. The outer cell layer in a flatworm is?
20. Roundworms have ________ development.
21. The type of symmetry that marine worms have is ________ symmetry.
22. Roundworms mostly live in ________ zones?
24. Which phylum name means “Little Rings”?
25. Which marine worm belongs to Class Polychaete, which means “Many Bristles”?

1. Muscles that contract to make a worm short are ________ muscles.
3. Which marine worm has no circulatory or respiratory system and moves by muscular contractions and cilia movement?
4. A sharp organ used by ribbon worms to spear prey is the ________?
6. Planaria have a mouth on the ________ surface of the body.
7. What phylum name means “Bristle Jaw”?
10. The inner cell layer in a flatworm is?
11. Platyhelminthes means ________?
13. What lives on or in a living host from which it gets its nutrition?
14. Bloodworms have an ________ circulatory system.
16. Flatworms do Asexual reproduction by ________.
23. Roundworms are a part of the phylum ________?