Photo de stock - The protozoan called paramecium swims freely in its search for food such as bacteria. It captures the prey with its cilia (also shown enlarged). Enzymes in the food vacuoles digest the prey, and contractile vacuoles expel excess water.

Photo de stock: The protozoan called paramecium swims freely in its search for food such as bacteria. It captures the prey with its cilia (also shown enlarged).

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