closed type of circulatory system is not seen in
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Closed circulatory systems have the blood closed at all 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.
A. Earthworm has closed circulatory system. It circulates blood exclusively through three vessels. These vessels are aortic arches, dorsal blood vessels and ventral blood vessels.
B. Squids also has closed circulatory system.
C. Humans also has closed circulatory system.
So, the correct answer is 'All of the above'.
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