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Biology, 21.01.2020 01:31 Hcalhoun21

In an open circulatory system, blood is not always confined to blood vessels and is under higher pressure than in closed circulatory systems always inside of vessels and is under lower pressure than in closed circulatory systems not always confined to blood vessels and is under lower pressure than in closed circulatory systems always inside of vessels and is under higher pressure than in closed circulatory systems

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