..dre organelles belonging to Some animal cells.- arrangement of nine outer pairs oF mierotubules and two Central ones hvs is Called (942 urrangment),& probably give beoting movments -He exacT mechaniSm is not clear.u. Flagella: longer loo am & Fewer in number Such as tail F sperm move whole ce ll or organiSm 5.2.Tey are thin cutoplasmic threads projecting From the Surface oF the cel.3.Both Containing microtubules they are similar in sructure.on Surface oF Some cells Such as epithelia lining tracheaCilia : Shorfer 5.1o um Large number.beats backwards and Forwards in one direction.