Centrioles are present near the nucleus (Centrosome and centrloles)

Two centrioles are present near the nucleus.  They are cylindrical in structure which lie close to each other in a region called centrosome.  Centrioles pay an important role in animal cell division. Nemerous small rounded bodies present in the cytoplasm are called vacuoles.  These store waste materials, water, air and food particles.

Nucleus

The most important and visible organelle of a cell is the nucleus.  Generally, it is rounded in shape and present in the center of the cell. It controls all the activities of teh cell.  Therefore, it is known as control center or brain of a cell.  A membrane, called unclear membrane, surrounds the nucleus. Small thread like structures, chromosomes, are found in the nucleus, which control the characteristics of living organisms.  Chromosomes are passed down from one generation to another and contain chemical material, DNA, which is responsible for heredity.