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Mollusk/Echinoderms
5th grade test
| Term | Definition |
|---|---|
| Mollusk | mollusks are invertebrates that have a soft body, example: slug |
| Mantle | the fleshy covering that protects the organs of a mollusk; produces materials that form one or two shells |
| Echinoderm | a spiny skinned invertebrate that lives in the ocean, example sea star. The outer body of a sea star is made up of hard plates covered by a thin skin. |
| Tube Foot | a hollow structure with a sucker on the end. This is how echinoderms move and get food. |
| Traits of Mollusks | The body has three parts: the head, the foot and the body mass. They have soft bodies. Mollusks have a mantle which is a fleshy covering that protects its organs. |
| How do echinoderms move? | They have tube feet that have suckers on the end. Water is pumped into the tube feet and the feet extend. Water is sucked back into the body and the feet contract. |
| Bivalve | Group of mollusks with two shells - example is clam |
| Cephalopod | Group of mollusks that have no shell - example is octopi |
| Traits of Echinoderms | 1. live in water 2. have tube feet 3. spiny and hard skin 4. they all regenerate |
| the 3 parts of a mollusk | head, foot, and body mass (contains heart and other organs) |
| How does the clam feed? | Filter feeds with tubelike parts |
| Univalve | A mollusk with one shell |
Created by:
oberholzerfam
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