One is Open ciculatory system & one is Closed circulatory system. Open ciculatory systems are systems where internal organs and body tissues are surrounded by circulatory fluid. A closed circulatory system is the system where blood is contained within vessels.
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Priyanka Sahu answered this
Double circulatory system and systemic circulatory system
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Kirti answered this
Closed circulatory system and closed circulatory system ..
