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Graphical

ciliumflagellumCell projection

Definition

The flagellum is a long whip-like or feathery structure which propels the cell through a liquid medium. This motile cilium is produced by the unicellular eukaryotes, and by the motile male gametes of many eukaryotic organisms. The flagella commonly have a characteristic axial '9+2' microtubular array (axoneme) and bends are generated along the length of the flagellum by restricted sliding of the nine outer doublets.

Synonyms

Flagella
Motile cilia
Motile cilium
Undulipodia
Undulipodium

Category

› Cellular component

GOi

obsolete flagellum [ GO:0019861 ]