Didinium attacking Paramecium

Didinium attacking Paramecium

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Caption: Didinium attacks Paramecium. Coloured scanning electron micrograph (SEM) showing a one-celled Didinium (at left) in the process of attacking a one-celled Paramecium sp. (green). These animals are ciliate protozoans, both bearing cilia. The barrel-shaped Didinium has two girdles of loco- motory cilia, and a prominent snout which is used as a probing and seizing organ during feeding. The Paramecium has cilia across its body used for movement. The Didinium has manoeuvred the Para- mecium, almost twice its own size, into an easier position for ingestion. The Didinium's snout and gullet are enormously expanded in preparation for the meal. Magnification: x730 at 6x6cm size.

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Keywords: animal, attacking, cilia, ciliate, ciliates, coloured, didinium sp., eating, invertebrate, invertebrates, nature, one-celled, paramecium sp., predator, prey, protozoa, protozoan, protozoans, scanning electron micrograph, sem, wildlife, zoology

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