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Science Mollusks notes
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16
Science
7th Grade
04/18/2012

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Term
soft bodied invertebrates with bilateral symmentry and usually one or two shells with organs in a fluid filled cavity
Definition
mollusks
Term
thin layer of tissue that covers the body organs and secretes shell
Definition
mantle
Term
What contains gills?
Definition
Mantle cavity
Term
Whose open circulatory system moves blood through vessels and and into open spaces around body organs?
Definition
most mollusks
Term
What has a mouth and some sensory organs?
Definition
a well-developed head
Term
What is a muscular food used to move?
Definition
underside
Term
How are mollusks classified?
Definition
into groups based on shell presense, shell type, and foot type
Term
What usually have a single shell?
Definition
gastropods
Term
What are some mollusks?
Definition
snails, conchs, and garden slugs
Term
What do Mollusks use to get food?
Definition
their radula
Term
What do Bivalves have?
Definition
a hinged, 2-part shell and include clams , oysters and scallops
Term
What do cephalopods have?
Definition
a well-developed head and complex mollusks
Term
What are some chphalopods?
Definition
squids, octopuses, cuttlefish, and chambered nautiluses
Term
developed head and many tentacles for capturing prey
Definition
cephalopods
Term
Do cephalopods have a closed circulatory system that moves blood through the body in a series of closed vessels?
Definition
yes
Term
What are 3 common groups of mollusks?
Definition
gastropods, bivalves, and cephalopods
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