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A '''Flagellum''' is a long, tail-like [[organelle]] in a [[cell]] that allows a cell to move around. It is made up of [[microtubule]]s and surrounded by a [[plasma]] [[membrane]].
[[Image:BacterialFlagellum.jpg|thumb|200px|right|[[flagellum|Bacterial Flagellum]] with rotary motor, courtesy of Access Research Network (Art Battson)]]
A '''flagellum''' is a long, tail-like [[organelle]] in a [[cell]] that allows a cell to move around. It is made up of [[microtubule]]s and surrounded by a [[plasma]] [[membrane]].
In single-cell [[organism]]s flagella move like a whip to provide propulsion to the cell. As part of a larger organism, their function is often to move fluids along mucous membranes. When they perform this function, they are called [[cilia]].
In single-cell [[organism]]s flagella move like a whip to provide propulsion to the cell. As part of a larger organism, their function is often to move fluids along mucous membranes. When they perform this function, they are called [[cilia]].