Understanding Mollusks

Explain the importance of the coelom to mollusks.

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Analyze the function of the mantle and its adaptive advantages to mollusks.

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Explain the importance of mucus and the muscular foot to mollusks.

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What are the characteristics of mollusks?

• Bilateral symmetry, soft internal body, digestive tract with two openings, muscular foot, and mantle

• Radula, gills, and nephridia

• Open circulatory system and closed circulatory system

• All of the above

What do many mollusks use to scrape food into their mouths?

• Gills

• Radula

• Mantle

• Muscular foot

How do land snails and slugs remove oxygen from the air?

• Using gills

• Using the lining of their mantle cavities

• Through their muscular foot

• By filter feeding

What type of circulatory system do most mollusks have?

• Open circulatory system

• Closed circulatory system

• Both open and closed

• None of the above

What structures do mollusks use to get rid of metabolic wastes?

• Gills

• Nephridia

• Mantle

• Digestive glands

What is the largest class of mollusks?

• Bivalves

• Cephalopods

• Gastropods

• Polyplacophorans

What are bivalves?

• Two-shelled mollusks

• Head-footed mollusks

• Stomach-footed mollusks

• None of the above