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Question

Closed circulatory system is present in

A
Echinoderms
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B
Cephalopods
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C
Vertebrates
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D
All of the above
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Solution

The correct option is C Vertebrates
Closed circulatory system is present in cephalopods as well as vertebrates.
Cephalopods are the only mollusks with a closed circulatory system. Coleoids have teo gill hearts that move blodd through the capillaries of the gills. A single systematic heart then pumps the oxygenated blood through the rest of the body.
Vertebrates have a closed circulatory system. Closed circulatory system have the blodd closed at all the times within vessels of different size and wall thickness. IN this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities.


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