Cytokinesis is the process by which two cells split after cell division, or mitosis. The process is different between animal and plant cells. Mitosis is the process of nuclear division.
Cytokinesis entails the division of the cytoplasm and organelles among the two daughter cells. In animal cells, actin microfilaments form a circle between the two daughter nuclei. The microfilaments continue to contract, forming a furrow ring that squeezes the two daughter cells tighter until they finally separate. In plant cells, vesicles form between the two nuclei. The vesicles fuse with one another until a cell plate forms, making a new cell wall that completely separates the daughter cells.