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flagellum
(redirected from flagellar)

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flagellum

Enlarge picture
The bacterium Proteus vulgaris (greatly magnified) showing flagella
(credit: © Lee D. Simon—Photo Researchers)
Hairlike structure that acts mainly as an organelle of movement in the cells of many living organisms. Characteristic of the protozoan group Mastigophora, flagella also occur on the sex cells of algae, fungi (see fungus), mosses, and slime molds. Flagellar motion causes water currents necessary for respiration and circulation in sponges and cnidarians. Most motile bacteria move by means of flagella. The structures and patterns of movement of flagella in prokaryotes differ from those in eukaryotes. See also cilium.

flagellum
1. Biology a long whiplike outgrowth from a cell that acts as an organ of locomotion: occurs in some protozoans, gametes, spores, etc.
2. Botany a long thin supple shoot or runner
3. Zoology the terminal whiplike part of an arthropod's appendage, esp of the antenna of many insects


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These stable, paired dances are caused by the undulating flagellar motion of each algal colony and by the peculiar fluid flows near the glass coverslip, where the Volvox prefer to swim.
Microswimmers make a splash: tiny travelers take on a viscous world by Sanders, Laura / Science News
For this reason, the study of flagellar organisation has potentially broad implications for human health and disease.
'Dancing' algae can 'waltz' and 'minuet' by Asian News International
One of the main arguments was that the bacterial flagellar apparatus, consisting of quite a large number of proteins with different functions, could not have evolved because each of the protein subunits could not have evolved separately.
Microcosm: E. coli and the New Science of Life by Wood, E.J. / Clinical Dermatology
 
 
 
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