Paramecium protozoa. Coloured scanning electron micrograph (SEM) of Paramecium sp. protozoa. These single-celled organisms are aquatic, being found in freshwater habitats. They are covered in cilia, short hair-like structures used for swimming and for wafting food along the oral groove into the oral cavity ("mouth") seen in this micrograph at centre. Magnification: x2580 (x640 at 10cm width).
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