Photo credit: MSC

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

What is a Mollusk? Photo credit: NOAA

Mollusks are Animals… From the Latin: “Mollusca” Soft-bodied Invertebrate 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 Univalve: 1 shell Bivalve: 2 shells Photo credits: MSC

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

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?

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

More Nudibranchs Photo credits: MSC

Bivalves Photo credit: MSC Photo credit: NOAA

Cephalopods Photo credit: MSC

More Octopi Photo credit: MSC

Squids Photo credit: MSC

The Chambered Nautilus Photo credits: MSC

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

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