Mollusca Flashcards
(47 cards)
Which classes make up Mollusca?
Polyplacophacophora, Gastropoda, Bivalve and Cephalopoda
Another name for Polyplacophacophora is
the chitons
Another name for Gastropoda
snails and slugs
Another name for Bivalvia
bivalves
Another name for Cephalopoda
cephalopods
One characteristic lost by Mollusks as opposed to members of Annelida
segmented bodies
In relation to body cavities, Mollusks are
eucoelomates, but their coeloms are reduced
All classes of Mollusca display cephalization except,
the bivalves
Mollusks have a ____ digestive tract
complete with regional specialization
Mollusks are the first of our studies to have complex ______ _______
organ systems
What do Mollusks use for locomotion
muscular foot
Mollusks organs are contained within
a dorsal visceral mass that is covered by a mantle that also secretes a shell
A radula is
a grating mouthpiece
The class that lost radulas are
bivalves due to their filter feeding
The chitons are characterized by their
8 dorsal plates
Members of the bivalves include
clams, muscles, scallops and oysters
The oldest portion of bivalves’ shells, close to the hinge is called
the umbo
The most diverse class of Mollusks is
Gastropoda
The class Cephalopoda includes
octopuses, squids, cuttlefish and nautiluses
The ventral foot found on Molluscs is modified into what in Cephalopoda members?
arms and tentacles
A way to identify Cephalopoda tentacles from arms
tentacles are longer than their arms
Cephalopoda are known as
the dos intelligent invertebrate
Where is the radula located in Cephalopoda members
within the beak located on their buccal bulbs
What allows some Cephalopoda to change color?
chromatophores which are pigmented cells
