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What can we say about vertebrate circulation? do they have? a, an open circulatory system.
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This is the kind of circulatory system found, example, insects, where instead of contained vessels, the blood or hemalymph flows freely throughout the organism, pumped by a central heart.
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B, a closed circulatory system.
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The opposite, all of the blood or hemalymph is contained within blood vessels, as we have.
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C, a four -chamber heart.
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Again, as we have, a heart with two atria and two ventricles.
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Or d, hemolymph...