Which of the following is NOT a characteristi | vedclass

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(D) In an open circulatory system,blood is pumped out of the heart into body cavities or sinuses called haemocoel. Because the blood is not confined t

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Blood flows through vessels

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(D) In an open circulatory system,blood is pumped out of the heart into body cavities or sinuses called haemocoel. Because the blood is not confined to vessels,it flows at a low pressure. Respiratory pigments may or may not be present in open circulation (e.g.,insects lack respiratory pigments,while molluscs may have haemocyanin). However,the defining characteristic of a closed circulatory system is that blood flows through a continuous network of blood vessels. Therefore,the statement that blood flows through vessels is characteristic of a closed circulatory system,not an open one.

Which of the following is $NOT$ a characteristic feature of open circulation?

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