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  1. When Paramecium comes in contact with bacteria, rows of cilia lining the oral groove move the food down to the end of the groove where it becomes engulfed in a food vacuole by the process of phagocytosis. Food vacuoles created in this way merge with the cell's lysosomes which dump in enzymes to digest the bacteria. Food vacuoles circulate within Paramecium moving first to the anterior end and then to the posterior end. In the photo to the left, several paramecia feed on a large cluster of filamentous bacteria.

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