Credit: FRANK FOX/SCIENCE PHOTO LIBRARY

Caption: Stentor with vorticella. Light microscope footage of ciliate protozoa Stentor sp. (top, partly visible) and Vorticella sp. (centre). Both are filter-feeding freshwater protozoa. Stentor species can reach lengths up to 2 millimetres, and are among the largest known unicellular organisms. Some species live symbiotically with certain species of green algae (numerous green spheres). After being ingested, the algae live on and continue to photosynthesize, while their host absorbs nutrients produced, and the algae receive protection and feed on the Stentor?'?s metabolic wastes. Vorticella consist of a bell-shaped head and a contractile stalk that is anchored to the substrate. Cilia (tiny hair-like structures) attached to the head are used to create currents to capture food and also for movement.

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Keywords: 20 seconds or greater, alga, algae, algal, alveolata, animalicule, biological, biology, cell, chromalveolata, cilia, ciliate, ciliophora, cilium, close up, close-up, contractile vacuole, eukaryota, eukaryote, fauna, feeding, filter feeder, filter feeding, fresh water, freshwater, internal structure, invertebrate, invertebrates, light, light microscope, light microscopy, lm, micro-organism, micro-organisms, microbe, microbiological, microbiology, microorganism, microorganisms, microscope, microscopic, motile, moving, nature, no-one, nobody, oligohymenophorea, oral ring, organism, peritrich, peritrichia, protist, protozoa, protozoan, purple background, sessilida, single celled, single-celled, stalk, stentor, stentor sp, swimming, symbiosis, symbiotic, trumpet, unicellular, vorticella, vorticella sp, vorticellidae, wildlife, zoological, zoology

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Vorticella and stentor protozoa

K005/3568 Rights Managed

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Duration: 00:00:25.24

Frame size: 1920x1080

Frame rate: 25

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Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 674.4M

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Codec: Apple ProRes 422

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