SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY
Ciliate protozoan. High-speed microscope footage of a ciliate protozoan expelling waste material. Ciliate protozoa are tiny single-celled aquatic organisms. They move about by the rhythmic beating of many hair-like cilia on the surface of the cell. They feed on algae, bacteria and decaying organic matter which are swept into the oral cavity by modified oral cilia. Sample taken from the River Teifi, Wales, UK.
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