Download Name Period ______ Mollusk Review Pack Vocabulary Across 2

Name ___________________________________
Period ____________
Mollusk Review Pack
I. Vocabulary
Across
2. shell of a clam
4. oldest part of the clam
5. thin layer that covers visceral mass and secretes the shell in mollusks
8. location of gills
10. class of mollusks that contains squid and octopi
14. pigment cells in cephalopods
17. class of mollusks that contains snails and slugs
18. water and food enter and exit this structure in a clam
20. paired cluster of nerve cells
21. one of he body region of mollusks
22. type of circulatory system where circulatory fluid never leaves arteries and veins
Down
1. food is absorbed in this structure of the clam
3. controls the opening and closing of the clam's shell
6. class that contains clams, oysters, and muscles
7. type of movement used by Cephalopods
9. body region of mollusk that contain organs
11. mouth like organ in mollusks
12. visceral mass is twisted 180° in order for snails to hide its head in its shell
13. connects the two valves of a clam
15. type of circulatory system in which circulatory fluid is released directly into spaces
inside tissue
16. defense mechanism used by cephalopods in order to get a quick get away from
predators
19. flap like structure that surround and guide food into the clam's mouth
II. Diagrams
Diagram 1: Snails
Use the word bank below:
Eyespots
foot
head
Mouth
respiratory pore
shell
tentacles
Diagram 2: Clams
Word Bank
A.
B.
C.
D.
E.
F.
G.
H.
I.
Adductor Muscles
Excurrent Siphon
Gills
Foot
Incurrent Siphon
Mantle
Mouth
Palps
Umbo
Diagram C: Squid
Arms
beak and mouth
eye
Fins
head
hooks/suckers
Mantle
siphon
tentacles
III.
MATCH THE MOLLUSK CLASS WITH THE DESCRIPTION GIVEN:
BIVALVES
GASTROPODS
CEPHALOPODS
Includes: clams, oysters, & scallops _______________________________
Includes: octopus, squid, & chambered nautilus _____________________________
Includes: snails, slugs, conchs, abalones, & nudibranchs ________________________
Most have 2 shells _______________________
Most have 1 shell ________________________
Most have NO shell _________________________
Have the most advanced invertebrate brain ____________________________
Only mollusks with NO radula ___________________________
Foot secretes chemical so animals can glide on surface
___________________________
Animals secrete ink for defense___________________________
Food is modified to form arm and tentacles ___________________________
Animals have chromatophores ___________________________
Foot is used to bury in the sand or mud ___________________________
Animals filter feed ___________________________
Torsion occurs ___________________________
Open circulatory system ____________________
____________________
Closed circulatory system ___________________________
IV. Short answer
1. Identify two characteristics of all mollusks.
2. Describe the two different body regions of all mollusks.
3. Describe two ways cephalopods are more advanced than other mollusks.
4. What are two functions of the mantle in snails?
5. Describe how the speed of the squid’s movement is controlled.
a. Describe how the squid can change direction of movement?
6. How are snails able to sense their surroundings?
7. Describe the difference between a closed and open circulatory system.
8. Name two functions of the gills in clams.
9. Explain how the function of the siphon of the clam is different from the squid.
10. Identify two reasons why an octopus would use its chromatophores.
11. Describe three ways that an octopi and squid are similar and three ways they are
different.
Octopi
Squid
Similarity 1
Similarity 2
Similarity 3
Difference 1
Difference 2
Difference 3