Within an animal cell centrosome there â¦ is a pair of small organelles, the centrioles, each made up of a ring of nine groups of microtubules.    There are three fused microtubules in each group. The two centrioles are arranged such that one is perpendicular to the other.   During animal cell division, the centrosome divides and the centrioles replicate (make new copies). The result is two centrosomes, each with its own pair of centrioles.he centrioles are perpendicular to each other. They are important in the organization on the cell. Their most important role in a cell is when the cell divides.