So centrioles are involved in the formation of mitotic spindle fibers during cell division. However, recent evidence shows that if we actually destroy our Centrios our cell cycle still takes place, mitosis still takes place. So basically, we can imagine that Centrios make our separation of chromosomes very efficient. However, they are not exactly necessary for mitosis to actually take place. Now, what exactly is the second function of the centriole? Well, basically, the centriole is our region that extends and creates those microtubules and microtubules compose our cytoskeleton.