In a closed circulatory system, blood is completely enclosed within
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Vertebrates, and a few invertebrates, have a closed circulatory system.Closed circulatory systems have theblood closed at all times withinvessels of different size and wall thickness. In this type of system, bloodis pumped by a heart through vessels, and does not normally fill body cavities.
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Heya there
The blood is enclosed within vessels
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