How does an animal cell pinch itself into two during cytokinesis?

1. An animal cell has no cell wall, so it can simply squeeze in at the middle. 2. A ring of actin filaments assembles just under the membrane at the old metaphase plate. 3. As the ring contracts it pulls the equator of the cell inward and makes a cleavage furrow. 4. The furrow deepens until the membrane is cut in two. 5. The Golgi vesicle route is the plant cell method, which builds a wall rather than pinching. _Source: OpenStax Biology 1e (CC BY 4.0), Chs 10 and 11, section 10.2 The Cell Cycle_