What exactly is a centriole? So the centrosome contains a pair of centrioles that are a cylindrical array of nine triplep microtubules that are connected to one another by special protein connecting fibers. Now, this pattern is commonly known as the nine to three microtubule pattern. And we see that the centrioles are simply specialized structures, specialized microtubial structures. Now, what exactly is the structure of our centriole? What exactly does it look like?