Numbers & Animals
How many classes of mollusks are there?
7
What does the name gastropoda mean?
What does the term Bivalvia mean?
2 shells
What does the term cephalopoda mean?
"Head footed"
Which class of mollusk is most likely to burrow into the sediment?
bivalves
How many hearts does an octopus have?
3
What is the shell of gastropods made out of?
calcium carbonate
The tube-like extension through which water flows in and out of the mantle cavity in bivalves and cephalopods
siphons
A gland found in some cephalopods that secretes a dark fluid used to discourage predators
ink sac
The foot of mollusks is ___? (anterior, posterior, dorsal, or ventral)
ventral
Give an example of a gastropod.
Snail
What is the thin layer of tissue that secrets the shell of a mussel?
Mantle
What is the muscle that closes and opens the shells of a bivalve?
adductor muscle
Name the reduced, thin shell of squids.
pen
Which class of Mollusk is the most "intelligent"?
Cephalopoda
Give 2 examples of a Bivalve.
clam, mussel, scallop, oyster, etc.
Name the muscular locomotory structure in mollusks.
Foot
What are strong fibers secreted by mussels for attachment?
Byssal threads
What four functions do squid achieve while forcing water from their siphon?
movement, defense (ink cloud), excretion of waste, respiration
bilateral
Give 3 examples of a cephalopod.
Octopus, squid, cuttlefish, nautillus
What is the material that the radula is composed of?
Chitin
Name of the organs responsible for respiration in mollusks.
gills
What are chromatophores?
Why is the blood of an octopus blue?
it is rich in copper (not iron like humans)