How does cytokinesis differ in plant cells and animal cells?

In the context of growth, cytokinesis is the physical process that divides the cytoplasm of a parent cell into two daughter cells. While the goal is the same for both, animal and plant cells utilize distinct mechanisms to achieve this separation.12

Animal Cell Cytokinesis

In animal cells, division occurs through constriction. A ring of contractile microfilaments, composed of actin and myosin, forms around the cell's equator. As these proteins contract, they pinch the cell membrane inward, eventually separating the cytoplasm into two distinct cells.12

Plant Cell Cytokinesis

Because plant cells are encased in a rigid cell wall, they cannot be pinched inward. Instead, they build a new partition from the inside out:

• Cell Plate Formation: Small vesicles derived from the Golgi apparatus gather at the equator of the cell and coalesce to form a disk-shaped structure known as the cell plate.2
• Expansion and Fusion: The cell plate expands as more vesicles fuse with its edges until it reaches and connects with the parent cell's walls.2
• Maturation: Once the separation is complete, cellulose synthesis begins, transforming the cell plate into a primary cell wall that separates the two new daughter cells.12