When mitosis is about to take place, they separate from one another and pass to the poles of the nucleus, forming the achromatic spindle.
Here the cell is about to start entering mitosis.
This is imperative if cell mitosis is to continue, as cell division will only occur if cells are kept at body temperature.
If the chromosomes of such cells are selectively stained with a dye such as acetic orcein, stages in mitosis can be observed.
A corneal abrasion heals by the movement of neighboring epithelial cells, which slide over the wounded area, and through a cell division process called mitosis, which fill in the abraded area with new epithelial cells.