In biology, a vacuole is a fluid-filled, membrane-bound cavity inside a cell. It may be a reservoir for fluids that the cell will secrete to the outside, or may be filled with excretory products or essential nutrients that the cell needs to store. In amoebae, vacuoles are the sites of digestion of engulfed food particles. Plant cells usually have a large central vacuole for storage. Research Vacuole
 
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