Describe open and close circulatory system.
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open circulatory system is present in arthropods and molluscs in which blood is pumped by heart and passes through large vessels into open spaces or body cavities called sinuses.
closed circulatory system is prsesnt in annelids and chordates in which blood is pumped by heart is circulated through closed network of blood vessels.
closed circulatory system is prsesnt in annelids and chordates in which blood is pumped by heart is circulated through closed network of blood vessels.
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