The sp[ecies of mollusk that are specifically aquatic have gills for respiration, whereas some terrestrial types have lungs for respiration. This consists of gastrointestinal, anxious, excretory, reproductive, and breathing systems. The visceral mass exists above the foot, in the visceral bulge. The mantle cavity establishes separately from the coelomic cavity. Mollusk is called eucoelomate, however, the coelomic cavity is limited to a cavity around the heart in adult animals. The foot is the ventral-most organ, whereas the mantle is the restricting dorsal organ. The foot is retractable along with an extendable organ. In shelled mollusk, this foot is generally the same size as the opening of the shell. Mollusk have a muscular foot, which is used majorly for anchorage and mobility and differs in function and shapes, depending upon the kind of mollusk under research study. Summary What Is A Mollusk – Full Description.
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