Biology

 

 

Structure :

Centriole is a cylindrical or barrel shaped structure that can be found lying adjacent to the nucleus. It basically consists of microtubules. Each centriole consists of nine microtubules. Both the centrioles are found in pairs, and they are positioned at an right angles to one another. At the time of cell division, both the centrioles move in the opposite direction towards the poles or ends of the nucleus. Centrioles become evident only at the time of cell division. At other times, one can see only the centrosome as a darker area of the cytoplasm.STRUCTURE

Function:

Centriole plays a crucial role at the time of cell division. At the time of cell division, centrioles replicate to form two centrosomes, each with two centrioles. The two centrosomes then move in the opposite direction towards the opposite ends of the nucleus. From each centrosome, some thread like microtubules appear, which are known as spindle or mitotic spindle. During cell division, the single parent cell divides itself into two daughter cells, and the spindle is responsible for separating or pulling the replicated chromosomes to the two daughter cells. So, centrioles helps in the organization of the mitotic spindle, as well as the completion of cytokinesis.FUNCTION