Unlike open circulatory systems, closed circulatory systems are more efficient at delivering oxygenated blood directly to tissues according to their metabolic and energetic demands.

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Closed circulatory systems, found in vertebrates and some invertebrates, have a higher degree of control over blood flow and can direct oxygenated blood precisely where it is needed, making them more efficient than open circulatory systems where blood is not confined to vessels and the degree of control is limited.

Unlike Open Circulatory Systems, Closed Circulatory Systems Are More Efficient