5. What is Closed type of circulatory system?
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Explanation:
closed circulatory system have the blood closed all the times within vessel of different size and wall thickness. in in this type of system, blood is pumped by heart through vessels, does not normally fill body cavities
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Closed Circulatory System
. The blood circulates within closed vessels.
- Blood and interstitial fluid are distinct.
- Present in annelids and vertebrates.
- Blood is pumped through the vessels by the heart.
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