Mollusks

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Mollusks

• Mollusks and You

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Mollusks

• Mollusks have a soft mantle that produces a hard
  shell in many species

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Many use a soft muscular foot for movement
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Feeding

• Mollusks feed by scraping, tearing, stabbing and
  cutting their food

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• Most mollusks have a closed circulatory system.
  All other then cephalopods.
• Visceral mass holds most internal organs

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Sight

• Some have complex and extremely acute eyesight.
• Name means Soft Body

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Cephalopods
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Cephalopod Characteristics

• Foot attached to head
• Many have protective
• ink

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Cephalopod Characteristics cont Siphon (aka
funnel)
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How a Siphon works
Cephalopods are SMART
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Cephalopods have a radula tongue-like organ
that protudes from the mouth
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Examples of Cephalopods
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Gastropods-Examples
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Gastropod stomach footed

• Foot comes out of the stomach region
• Undergo torsion- the
• visceral mass turns
• 180 degrees
• Have eyes on stalks
• Single shell

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Bivalves- Characteristics and Examples
Have hinged two piece shell Use siphon to such
the water to eat food
Clams, oysters, and scallops
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PBS NatureHumbolt Squid