Cilia and flagella are hair-like outgrowths . of the cell membrane.
Cilia are small structures which work like oars causing the movement of either the cell or the surrounding fluid. Flagella are comparatively longer and responsible for cell movement Cilium and flagellum are covered by a plasma membrane. Their core called axoneme, pos-sesses a number of micro tubules running parallel to the long axis. The axoneme has nine pairs of doublets of radially arranged peripheral micro tubules and a pair of centrally located micro tubules.
The central tubules are connected by bridges and is enclosed by a central sheath, which is connected to one of the tubules of each peripheral doublets by a radial spoke. The peripheral doublets are also interconnected by linkers. Both cilium and flagellum emerge from centriole like structure called the basal bodies.
