Centrosomes are the site of microtubule organization in animal cells. They are regulators of the cell cycle and play an essential role in the process of mitosis.
Centrosomes are composed of two centrioles which are oriented at right angles to each other. They are located in the cytoplasm of animal cells, and are located near the cell’s nucleus. Centrosomes play a vital part in the cell cycle during the S phase. During this phase, the DNA of the cell is duplicated and the centrosomes are duplicated as well to help carry out mitosis. After the S phase, the two centrosomes move to opposite sides of the cell. Microtubules grow from the center of each centrosome to create spindle fibers at the metaphase plate.