According to the Cell Theory, new cells are only created by the division of existing cells. In particular, mitosis is perhaps the most dramatic stage[1] of the cell cycle as it involves both the disintegration and reorganization of the components of the cell.
Mitosis, by definition is a type of cell division that involves only the somatic cells (any cell of a living organism other than the reproductive cells).
In this process, the growth of the organism itself and the repair of any damaged tissues are ensured by continuously dividing cells. Mitosis is also the process by which lower eukaryotic organisms multiply through asexual reproduction (i.e. budding and use of runners).
In simpler terms, during mitosis, a single cell gets divided into two identical daughter cells.
The main purpose of mitosis is to allow growth of new cells and also to replace the repaired or worn-out cells.
