Name _______________________
Earthworm Lab - Questions
1. _____ The lip on the head of the earthworm covers the
A) anus
B) mouth C) sperm duct D) brain
2. _____ The clitellum is found
A) at the tail
C) near the tail end
B) near the head end
D) under the lip
3. _____ The lighter colored, flattened part of the earthworm is the
A) ventral side
B) dorsal side
C) posterior end
D) anterior end
4. _____ The anus is found
A) over the mouth
C) in each segment
B) under the clitellum
D) at the posterior end
5. _____ Four pair of setae are found
A) on almost every segment
C) on the lip
B) only under the clitellum
D) at the anus
6. _____ Sperm duct openings for the release of sperm are found on
A) male earthworms only
B) female earthworms only
C) all earthworms
7. _____ Each of the segments of the earthworm
A) contains specific body structures
C) is only an outside crease on the skin
B) is a separate worm
D) has its own heart
8. _____ How many “hearts” does an earthworm have?
A) one
B) three
C) five
D) seven
9. _____ The primitive “brain” is formed by
A) the crop
B) a clump of nerves
C) the gizzard
D) the gullet
10. _____ The following are all parts of the digestive system except the
A) esophagus
B) crop
C) gizzard
D) nephridia
11. _____ The grinding organ of the digestive system is the
A) intestine
B) gizzard
C) pharynx
D) crop
12. _____ The thin walled storage organ in the digestive system is the
A) intestine
B) gizzard
C) pharynx
D) crop
over ----->
13. _____ The longest organ of the digestive system where absorption occurs
is the A) intestine
B) gizzard
C) pharynx
D) crop
14. _____ The intestine begins at segment
A) three
B) seven
C) nineteen
D) thirty
15. _____ The grinding action in the gizzard is similar to what activity in more
complex organisms, such as man?
A) thinking
B) chewing
C) digesting
D) absorption
16. _____ What can you conclude about the earthworms reproductive system?
A) itʼs either male or female
B) itʼs both male and female
17. _____ To what organ system do the five aortic arches (“hearts”) belong?
A) digestive
B) circulatory
C) nervous
D) excretory
18. _____ What organ in the earthworm has a function similar to your spinal
cord?
A) the dorsal blood vessel
B) the ventral nerve cord
C) the nephridia
D) the clitellum
19. _____ To what organ system does the nephridia belong?
A) digestive
B) circulatory
C) nervous
D) excretory
20. _____ To what organ system do the brain, ventral nerve cord, and nerve
cells belong?
A) digestive
B) circulatory
C) nervous
D) excretory