Give examples from your own experience that prove that cells in your body are constantly dividing.

Cell division is ongoing. The principle of regeneration is based on normal cell division. Regeneration helps to repair the injured tissue site. For example, when a scratch appears on the skin, the epithelial layer is broken. But over time, cells begin to divide, and the damaged area is restored. Cells are constantly dividing, as can be seen in the growth of hair and nails. If the nails are trimmed, they will grow back over time, because the cells in the nail plate are constantly multiplying.