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mollusks
mollusca notes
10
Biology
7th Grade
04/24/2012

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Term
What are the 3 types?
Definition
1. gastropods
2. bivalves
3. cephalopods
Term
what are the 2 types of gastropods?
Definition
snails and slugs
Term
what are 2 types of bivalves?
Definition
clams and oysters
Term
what are 2 types of cephalopods?
Definition
squids and octopus
Term
what kind of circulatory system do they have?
Definition
open (except cephalopods, they have closed)
Term
what do they use in the place of a brain?
Definition
several ganglia that control breathing, foot movement, or digestion
Term
which type of invertebrate has the most complex nervous system?
Definition
cephalopods
Term
what are the 4 body parts that all of them have?
Definition
1. foot (not actual foot, lol)
2. visceral mass ( main body organs)
3. mantle (tissue-protects body)
4. shell
Term
how do they reproduce?
Definition
most sexually: external fertilization
Term
how do they eat?
Definition
bivalves- filter feed
gastropods- use a radula to eat
cephalopods- use tenticles and beak
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