Molluscs-circulatory system
State the type of circulatory system molluscs has? And compared it with the respiratory system of the annelids?
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Molluscs, (with exception of cephalopods), have open circulatory system, by this we means that the blood circulates within the vessels, from heart, but it also fills the cavities or open lacunas. In annelids, circulatory system is closed, which means that the blood circulates only inside the blood vessels.
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Geographic Information System (GIS): It is a system of software and hardware used for retrieval, storage, mapping, and analysis of geographic data. Practitioners as well regard the total GIS as together with the operating personnel and data which go i
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