Understanding Mollusks

Explain the importance of the coelom to mollusks.

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

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

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