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Which of the following mollusks has a closed circulatory system?

a. Clams
b. Snails
c. Cuttlefish
d. Scallops

User Divyesh Rupawala
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1 Answer

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All of the mollusks listed have a closed circulatory system. A closed circulatory system is a type of circulatory system in which the blood is always contained within vessels, such as arteries and veins. This is in contrast to an open circulatory system, in which the blood is not contained within vessels and is instead free-flowing within the body cavity of the organism.

User ThisIsSparta
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