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Euglenas are single-celled protists. They are unique as they can be both autotrophs (make their own food like plants) and heterotrophs (obtain their food from outside sources like animals). Euglenas have a mouth that takes in the food. The food is encapsulated into a vacuole by a process called phagocytosis. Digestive enzymes are sent into the vacuole and when the food is broken down, the nutrients are absorbed into the cell. Undigested waste is eliminated through exocytosis. This is the most rudimentary digestive system among living things.

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14y ago

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