Meet%20the%20Mollusks - PowerPoint PPT Presentation
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Meet%20the%20Mollusks
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Photo credit: MSC A Classroom Lesson from the Mathematics & Science Center Photo credit: NOAA What is a Mollusk? Photo credit: NOAA Mollusks are Animals – PowerPoint PPT presentation
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Title: Meet%20the%20Mollusks
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Photo credit MSC
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A Classroom Lesson
- from the
- Mathematics Science Center
Photo credit NOAA
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What is a Mollusk?
Photo credit NOAA
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Mollusks are Animals
- From the Latin Mollusca
- Soft-bodied
- Invertebrate
- 3 body parts Head, foot, mantle cavity
Photo credit USGS
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Sometimes with Shells
Photo credit USGS
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The Mantle
- Mantle secretes the shell and pearly lining
- Univalve 1 shell
- Bivalve 2 shells
Photo credits MSC
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Mollusks Movement
- Foot
- Muscular organ to move, dig, slide
- Radula
- Rasping tongue to obtain food or drill holes in
other shells
Photo credit USGS
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More Mollusk Info.
- 2nd largest group of animals
- 100,000 known species
- Most are Marine , but can live in fresh water and
on land - Importance to man?
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Classification
- 7 Classes of Mollusks
- 3 Major Classes
- Gastropoda
- Snails, slugs, limpets
- Bivalvia
- Clams, oysters, scallops, mussles
- Cephalopoda
- Octopus, squid, nautilus
Photo credit NOAA
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Land Snail
Photo credit NOAA
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Aquatic Snails
Photo credits MSC
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Slug
Photo credit NOAA
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Banana Slug
Photo credit MSC
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Nudibranch
Photo credit MSC
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More Nudibranchs
Photo credits MSC
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Bivalves
Photo credit MSC
Photo credit NOAA
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Cephalopods
Photo credit MSC
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More Octopi
Photo credit MSC
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Squids
Photo credit MSC
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The Chambered Nautilus
Photo credits MSC
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Mud Snails
- Observe the mud snail specimens
- Identify the following structures
- Foot
- Siphon tube
- Tentacles
- Eyes
- Operculum
- Radula
Illustration credit MSC
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References
- MSC (Mathematics Science Center Slide
Collection) - NOAA (National Oceanic and Atmospheric
Administration) Photo Library - USGS (U.S. Geological Survey)
- Golden Guide Seashells of the World
Photo credit USGS
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