The division of the cytoplasm during cell division is known as cytokinesis.
Cytokinesis is a crucial process that occurs at the end of cell division, following the mitosis or meiosis stages. During this process, the cytoplasm of a parental cell is divided into two daughter cells. In animal cells, this is achieved through the formation of a contractile ring that pinches the cell membrane to create two separate cells. In plant cells, a cell plate forms along the center of the cell, eventually leading to the development of a new cell wall that divides the two daughter cells.
This process ensures that each daughter cell has the necessary organelles, cytoplasm, and other cellular components to function properly. Without cytokinesis, the result would be multinucleated cells, which could lead to various cellular dysfunctions.