what is mollusca ? they have open circulatory system or closed circulatory system
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Mollusca is a large Phylum of invertebrate animals whose members are known as Molluscans.
They have open circulatory system.
They have open circulatory system.
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Explanation:
Mollusks have an open circulatory system, meaning the blood does not circulate entirely within vessels but is collected from the gills, pumped through the heart, and released directly into spaces in the tissues from which it returns to the gills and then to the heart.
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