Question
Write the differences between: Open and Closed system of circulation.
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Open system of circulation
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Closed system of circulation
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1.
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In this system, blood is pumped by the heart, through large vessels, into body cavities called sinuses.
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1.
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In this system, blood is pumped by the heart, through a closed network of vessels.
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2.
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The body tissues are in direct contact with blood.
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2.
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The body tissues are not in direct contact with blood.
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3.
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Blood flows at low pressure. Hence, it is a slower and less efficient system of circulation.
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3.
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Blood flows at high pressure. Hence, it is a faster and more efficient system of circulation.
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4.
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The flow of blood is not regulated through the tissues and organs.
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4.
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The flow of blood can be regulated by valves.
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5.
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This system is present in arthropods and mollusks.
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5.
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This system is present in annelids, echinoderms, and vertebrates.
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