Molluscs Flashcards

1
Q

Symmetry, blastia and coelom

A

Bilateral, triploblastic and coelomate

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2
Q

Give the 3 main body parts of a mollusc and their function

A

Muscular foot - for movement or anchorage
Visceral mass - Contains internal organs
Mantle - tissue over visceral mass that secretes the shell

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3
Q

What covers the radula

A

Chitinous teeth

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4
Q

What is around the esophagus and what extends from it

A

A nerve ring from which ventral nerve cords extend

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5
Q

What is the name of the structure that removes metabolic waste

A

Metanephridia

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6
Q

What is the ciliated larval stage in molluscs called

A

Trochophore

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7
Q

What is the class Polyplacophora also known as and how many dorsal plates is it divided into

A

Chitons - 8

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8
Q

Give an example of the class Gastropoda and what is the name of its embryonic process

A

Cone snail - Torsion

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9
Q

How does the class Bivalvia feed and what is the name of the muscles that draws halves together for protection

A

Suspension feeding - Abductor muscle

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10
Q

How do Cephalopods move

A

Draw water into the mantle cavity and expel via siphon - Jet Propulsion

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11
Q

What is the function of chromatophores

A

Camouflage

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