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study for test on 10/24/13

What is the mantle? a fleshy covering that protects the internal organs of a mollusk
What is a mollusk? invertebrate with a soft body
What is body mass? It contains a heart and other organs?
What is the head? where sense organs are located
What are three types of mollusks? bivalve, univalve, cephalpod
What are the five traits of a mollusk? Most have a shell, and they have a three-part body (head, foot, and body mass), soft body, and most all live in water.
What are four traits of an echinoderm? They all live in water, have two feet which helps them move and eat. They can regenerate, and have spiny skin.
What is a tube foot? hollow structure with a sucker at the end
What is an echinoderm? a spiny skinned invertebrate that lives in the ocean
How do tube feet help a sea star move? Water is pumped into the tube feet and the feet extend. Water is sucked back into the body and the feet contract. As the tube feet extend and contract, the sea star moves ahead.
Created by: dbothwell