Scars and scratches are to be cured by being covered with tapes. It happens because skin cells have ability to seal them by reproducing the cells. And, the cells stop reproducing when the scars and scratches are cured.
Cells that are able to reproduce themselves and to transform themselves into different cells are called Multipotential Stem Cells, and iPS cells are well-known. On the contrary, cells that divide to replenish dying cells are called Somatic Stem Cells. Fat Stem Cell is one of them. As we take them from subcutaneous fat and culture them, fat cells divide and secrete several types of growth factors.
As we drip cultured fat cells and its secretion into blood, multiple growth factors stimulate the cells to be activated,