Photo credit: MSC. A Classroom Lesson from the Mathematics & Science Center Mathematics & Science Center Photo credit: NOAA.

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Presentation transcript:

Photo credit: MSC

A Classroom Lesson from the Mathematics & Science Center Mathematics & Science Center Photo credit: NOAA

What is a Mollusk? Photo credit: NOAA

Mollusks are Animals… From the Latin: “Mollusca” From the Latin: “Mollusca” Soft-bodied Soft-bodied Invertebrate Invertebrate 3 body parts: Head, foot, mantle cavity 3 body parts: Head, foot, mantle cavity Photo credit: USGS

Sometimes with Shells Photo credit: USGS

The Mantle Mantle secretes the shell and pearly lining Mantle secretes the shell and pearly lining Univalve: 1 shell Univalve: 1 shell Bivalve: 2 shells Bivalve: 2 shells Photo credits: MSC

Mollusks & Movement Foot Foot Muscular organ to move, dig, slide… Muscular organ to move, dig, slide… Radula Radula Rasping tongue to obtain food or drill holes in other shells Rasping tongue to obtain food or drill holes in other shells Photo credit: USGS

More Mollusk Info. 2 nd largest group of animals 2 nd largest group of animals 100,000 known species Most are Marine, but can live in fresh water and on land Most are Marine, but can live in fresh water and on land Importance to man? Importance to man?

Classification 7 Classes of Mollusks 7 Classes of Mollusks 3 Major Classes 3 Major Classes Gastropoda Gastropoda Snails, slugs, limpets Snails, slugs, limpets Bivalvia Bivalvia Clams, oysters, scallops, mussles Clams, oysters, scallops, mussles Cephalopoda Cephalopoda Octopus, squid, nautilus Octopus, squid, nautilus Photo credit: NOAA

Land Snail Photo credit: NOAA

Aquatic Snails Photo credits: MSC

Slug Photo credit: NOAA

Banana Slug Photo credit: MSC

Nudibranch

More Nudibranchs Photo credits: MSC

Bivalves Photo credit: NOAA Photo credit: MSC

Cephalopods

More Octopi Photo credit: MSC

Squids

The Chambered Nautilus Photo credits: MSC

Mud Snails Observe the mud snail specimens Observe the mud snail specimens Identify the following structures: Identify the following structures: Foot Foot Siphon tube Siphon tube Tentacles Tentacles Eyes Eyes Operculum Operculum Radula Radula Illustration credit: MSC

References MSC (Mathematics & Science Center Slide Collection) MSC (Mathematics & Science Center Slide Collection) NOAA (National Oceanic and Atmospheric Administration) Photo Library NOAA (National Oceanic and Atmospheric Administration) Photo Library USGS (U.S. Geological Survey) USGS (U.S. Geological Survey) Golden Guide Seashells of the World Golden Guide Seashells of the World Photo credit: USGS