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Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
Mollusks
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Mollusks

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  • 1. Mollusks are soft-bodied animalswith a hard protective covering.
  • 2. There are manytypes of mollusks,including clams,oysters, snails,squid and octopi.There are manyMollusks that weeat!
  • 3. The Mollusk Phylum has threeMain classes:4. Gastropods (ex. - snails)2. Bivalves (ex. - clams)3. Cephalopods (ex. - squid)
  • 4. Mollusks have a mantle, which is protective tissueCovering its body. They breathe using gills, and theyMove using a muscular foot.
  • 5. One advancement that mollusks haveis an open circulatory system.The blood is not always inside of veins.
  • 6. Gastropods(snails) have adapted to life on land.This is a big step!Most gastropods are covered with a protective shell.Many have eyes.
  • 7. Gastropods use a radula, a rough tongue,to eat by scraping off food.
  • 8. The next class of mollusks is bivalves,which includes clams and oysters
  • 9. Bivalves are covered by a hard protectiveHinged shell, like this giant clam below.
  • 10. The last class of mollusks is cephalopods,Which includes octopi and squid.Cephalopod means “head-foot”.Can you see why it has this name?
  • 11. Cephalopods have many advancements:3. Closed circulatory system (blood alwayswithin heart or veins)2. A foot divided in to tentacles3. A well-developed nervous system with eyes
  • 12. Fact or fiction?
  • 13. Here is a photo of a real giant squid.
  • 14. The squid in the previous picture measured50 feet long and weighed 5000 lbs.! It’s eyeswould be almost the size of a soccer ball.And here’s an interesting fact….in the water,Giant squid are “Horace Mann” maroon incolor. Perhaps we should reconsiderour mascot?

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