MOLLUSK REVIEW (we did this in class)
Type of body cavity found in MOLLUSKS
The free swimming ciliated larva
Type of circulatory system found in bivalves and gastropods.
The flexible tongue-like strip covered with abrasive teeth that is found in all
mollusks except bivalves is called
Which organ is used by clams for respiration?
The octopus, squid, and chambered nautilus belong
The bump on the dorsal edge of a
are SESSILE as adults.
What does this mean?
Slugs and snails
belong to the CLASS of Mollusks called _______________.
Name the two functions of the gills in a clam.
group of mollusks that does NOT have an open circulatory system or a trochophore
13. The circulatory fluid in a clam is called ___________________
14. Gastropods undergo a process called ___________in which their visceral mass twists 180 o so the gills, anus, and mantle cavity end up at the front end of the animal.
The function of M is to ____________________________
area above the foot that contains the
Which kind of mollusks are
|18. G = ______________|
function of E is to
layer that secretes the shell in a clam is the
21. The structure that wraps around the intestine and pumps hemolymph is the_______________.
Clams have a nervous system like an earthworm.
23. Name the 4 body systems in a clam that use the mantle cavity.
What color is bile?
27. Give a function for the digestive gland.
TRUE or FALSE
Nitrogen waste exits through the anus in a clam
29. Tell one way clams are different from earthworms.
30. Tell one way clams and earthworms are alike.
CHECK YOUR ANSWERS
9. Stay in one place
11. Trap food & exchange gases
15. move food up from gills to mouth
16. visceral mass
17. Bivalves are filter feeders
18. excurrent siphon
19. remove nitrogen waste
earthworms have 2 cerebral ganglia and 1 ventral nerve cord
Clams have 3 pairs of ganglia; and 4 nerve cords throughout their bodies
23. Digestive (digestive waste is released from anus here)
Excretory (nitrogen waste is released by kidney here)
Reproductive (sperm or eggs released here; internal fertilization happens here)
Respiratory (gills are located here)
24. Invertebrate protostomes (* By the way: There is no such thing as vertebrate protostomes)
27. make bile, finish digestion, absorb nutrients
28. FALSE: Keep your waste straight!
Nitrogen waste is collected by kidney and is released into mantle cavity.
DIGESTIVE WASTE (FECES) exits through the ANUS!
|Open circulation||Closed circulation|
|3 pairs ganglia/
2 pairs nerve cords
|1 pair cerebral ganglia/
1 nerve cord
|gills||breathe through skin|
|have either internal (fresh) OR external (marine) fertilization depending on environment||external fertilization only|
|indirect developement (trochophore)||direct development|
Both CLAMS and EARTHWORMS are/have:
Dorsal heart/ventral nerve cord
2 opening digestive system
use sexual reproduction