CLASSIFICATION
NINE COMMON ANIMAL PHYLA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Closed
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Open
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Detailed explanation-1: -Most animals within the mollusca phylum have an open circulatory system. Cephalopods have a closed circulatory system. Within an open circulatory system blood is not restricted to circulating within the blood vessels.
Detailed explanation-2: -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-3: -Cephalopods have a closed circulatory system. Within a open circulatory system blood is not restricted to circulating within the blood vessels.
Detailed explanation-4: -The open circulatory system (evolved in insects, mollusks and other invertebrates) pumps blood into the blood co, and the blood diffuses back into the circulatory system between cells. The heart pumps blood into the body cavity, and the body tissues are surrounded by blood.