SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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open
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closed
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Either A or B
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None of the above
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Detailed explanation-1: -Arthropods possess an open circulatory system consisting of a dorsal heart and a system of arteries that may be very limited (as in insects) or extensive (as in crabs). The arteries deliver blood into tissue spaces (hemocoels), from which it eventually drains back to a large pericardial sinus surrounding the heart.
Detailed explanation-2: -Updated On: 27-06-2022. In Arthopods blood vessels are absent, sinuses are present. So they have open circulatory system.
Detailed explanation-3: -Phylum Arthropoda and phylum Mollusca have an open circulatory system where the internal organs are bathed in the blood. Cephalopods in molluscs are an exception as they have a closed circulatory system.
Detailed explanation-4: -Circulatory system in arthropods is of open type. i.e. blood flows in the general body cavity called haemocoel. It does not flow in definite blood vessels.
Detailed explanation-5: -Annelida and Coelenterata have closed circulatory systems whereas Arthropods and Mollusca have an open circulatory system.