Reading 27-3 Name______

1. Annelids are probably more closely related to ______and snails than they are to roundworms.
2. The Latin word “annellus” means ______
3. What are septa? ______
4. What are setae? ______
5. Annelids are worms with ______bodies.
They have a true ______that is lined with tissue derived from the mesoderm.
6. Name two ways that annelids can get their food: ______
7. What type of annelid has jaws to capture prey? ______
8. In earthworms, what is the job of the pharynx? ______
9. Once food enters the earthworm, it goes to two structures:
______(where food is stored)
______( grinds food )
10. What type of circulatory system do annelids have? ______
11. What are the two major blood vessels in the earthworm? ______
12. How do feather duster worms get oxygen? ______
13. How do land dwelling annelids (like the earthworm) get oxygen? ______
14. Excretory organs that that eliminate cellular waste: ______
15. Do annelids have a brain? ______
16. What type of skeleton do annelids have? ______
17. What are the two sets of muscles that help the worm move? ______
18. Paddle-like appendages found on marine worms are called ______
19. In earthworms, the ______secretes a mucus ring where sperm and eggs are released.
20. What class of annelids contain the earthworms and their relatives? ______
21. What is an earthworm casting? ______
22. What type of annelids belong to the class Hirudinea? ______
23. How do members of this class get their food? ______
24. Leeches can either bite their hosts or insert a muscular ______into the tissues.
25. What are two ways in which leeches are used in modern medicine?
______
26. Polychaetes are ______annelids that have paired, paddle-like appendages.
27. What did Aristotle call earthworms? ______
28. Name one way that earthworms help the soil?______
29. Name two animals that eat earthworms: ______
30. Marine annelids are numerous in areas where ______promotes bacterial growth.

ANALYZING DATA (not in your book, you must THINK)
1. The forest location had more castings than the swamp location in both 1990 and 2007.
True False

2. In all locations, the number of castings declined.
True False

3. The field had about _____ castings in 1990, and about _____ castings in 2007.

4. The data implies that:
a. the number of earthworms is declining
b. the number of earthworms is increasing
c. the number of earthworms is constant and depends on the location