A flagellum (/ fləˈdʒɛləm /; plural: flagella) is a lash - like appendage that protrudes from the cell body of certain bacterial and eukaryotic cells. The primary role of the flagellum is locomotion, but it also often has function as a sensory organelle, being sensitive to chemicals and temperatures outside the cell. The similar structure in the archaea functions in the same way but is structurally different and has been termed the archaellum.
where is the flagellum located in a cell
protrudes from the cell body