Thursday, September 30, 2010

Vacuoles

They are membranous sacs that are part of cytomembrane system. Vacuoles occur in different shapes and sizes and have various functions. In animals like protozoa and sponges, contractile vacuoles are present that collect water from the cytoplasm and pump it outside to maintain organism’s interval environment. Other protozoa and sponges have vacuoles for storing food.

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