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Mollusks/Echinoderms
study of various characteristics
18
Science
7th Grade
02/16/2009

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Cards

Term
molluscs characteristics
Definition
shells,eyes,foot,head,soft bodied
Term

Molluscs-Types

Definition

zero,one shell-gastropod

2shelled-hatchet footed

cephlopods

Term
Gastropod
Definition
stomach-footed
Term
Cephlopod
Definition
headfooted
Term
Echinoderm-Organisms
Definition
starfish,sand dollar,brittle star,urchin,sea cucumber
Term
Echinoderm-Characteristics
Definition

hard covering

rays/tentacles

water vascular system

ocean dwellers

Term
water vascular system
Definition
circulates water,food and wastes through echinoderm body
Term
nerve ring
Definition
found around mouth of echinoderm and radiates a nerve in each arm
Term
how do echinoderms eat
Definition
arms over shell of mollusk and when shell opens stomach leaves and enters mollusk secretes digestive juices  dissolves contents and returns to its body where further digestion takes place.
Term
How do molluks breathe
Definition
through gills
Term
What type of reproduction is found in both organisms
Definition
sexual
Term
where do we find green glands
Definition
in echinoderms/digestive enzymes
Term
what is the support system in a cephlapod
Definition
cartilage
Term
how do octopus and squid move
Definition
jet propulsion
Term
where are eyes of pecten found
Definition
along the rims of the shell
Term
what do pecten eyes see
Definition
light and dark
Term
how do starfish move
Definition
tube feet
Term
what is an open circulatory system
Definition
blood doesn't go through tubes it goes out directly into body
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