Arrangement of axonemal microtubules in a cilium or a flagellum is in the pattern of

Core of cilium or the flagellum is known as axoneme. It possesses a number of microtubules running parallel to the long axis. The axoneme usually has nine doublets of radially arranged peripheral microtubules, and a pair of centrally located microtubules. Such an arrangement of axonemal microtubules is referred to as the 9+2 array.