How does cell division help organisms grow?

After fertilization (this occurs during sexual reproduction; meosis), cell division must occur to physically develop and grow an organism (eg. humans: our skin and other cells of different tissues of different organs reproduce and grow using cell division). Also, the cells of different tissues of different organs inside our body must reproduce using cell division. There are important microorganisms (bacteria) that enable us, animals, to grow. A classic example is Eschericia Coli (E. Coli) This bacteria, like any other bacteria, must use cell division to grow.