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 Indian J Med Microbiol  
 

Figure 1: Schematic illustration of motile 9 + 2 cilia and primary 9 + 0 cilia. Motile cilia have inner and outer dynein arms, radial spokes, nexin links and a central microtubule pair surrounded by the central sheath. Primary cilia only have the nine outer microtubule doublets with the nexin links to stabilize the structure. The microtubule doublets are composed of A and B subfibers

Figure 1: Schematic illustration of motile 9 + 2 cilia and primary 9 + 0 cilia. Motile cilia have inner and outer dynein arms, radial spokes, nexin links and a central microtubule pair surrounded by the central sheath. Primary cilia only have the nine outer microtubule doublets with the nexin links to stabilize the structure. The microtubule doublets are composed of A and B subfibers