Respiratory system in aquatic molluscs
Classify respiratory system in the aquatic molluscs? Explain about the adaptive respiratory structure do terrestrial molluscs have?
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Aquatic molluscs oxygenate their blood with the help of the gills which are in direct contact with the water. In the terrestrial molluscs rich vascularity below mantle cavity absorbs air while doing role of the primitive lung.
Write down basic morphological features of echinoderms?
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