LM of Vorticella ciliates on a green alga

LM of Vorticella ciliates on a green alga

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Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a group of Vorticella (small tethered balloons) adhering to the freshwater green alga Hydrodictyon (large green cells). Vorticella are sessile, ciliate protozoans of the order Peritricha. Each one has a head or zooid and a retractable stalk which anchors it to the alga. The flattened top of the head bears the mouth and a complicated wreath of hair-like cilia. The beating of the cilia creates tiny vortices in the water which wash bacteria into the organism's mouth. Magnification: x100 at 35mm size.

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Keywords: animal, ciliate, hydrodictyon sp., invertebrate, invertebrates, light micrograph, nature, peritricha, protozoa, protozoan, vorticella sp., wildlife, zoology

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