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Welcome to MooMooMath and Science.

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In this video I would like to talk about mollusks which are a type of invertebrate.

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More specifically I would like to talk about the three major types of mollusks.

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I will focus on gastropods, bivalves and cephalopods.

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All mollusks have a soft body and bilateral symmetry.

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Almost all have a toothed tongue called a radula.

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And almost all have a muscular foot and or tentacles.

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Up first are the gastropods.

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With gastropods, their stomach lies above their foot.

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Many have an external shell.

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And examples include snails and slugs.

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The second group I would like to look at are the bivalves.

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These mollusks have two shells.

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They do not have a head and most are filter feeders and examples include clam, oysters,

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mussels and scallops.

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And finally, let's take a look at the cephalopods.

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Cephalopods have a prominent head, body, foot and a set of arms or tentacles.

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They have three hearts, a brain, blue blood, and many can change colors.

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Examples include an octopus, squid, and cuttlefish.

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Thanks for watching and MooMooMath uploads a new math and science video every day.

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