Choose the correct answer from the alternatives given.
Which of the following has a closed type of circulatory system?

Cockroach

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Fish

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Scorpion

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Mollusc

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Solution

The correct option is B Fish
In an open circulatory system, the blood is pumped by the heart into the body cavity or the hemocoel. It is found in Arthropoda and Molluscs. Example: Cockroach, Scorpian.
In a closed circulatory system, the blood is circulated through blood vessels. It is found in vertebrates and annelids. Example: Fish.
So, the correct option is 'Fish'.

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