Mesenchymal Stem Cells (MSCs) are derived from the embryonic germ layer of early fetal development. They are multifunctional stem cells. They have the ability to highly "self-proliferate" and "differentiate", and have the function of repairing various tissues and organs.​

Cells are the basic unit of life, and various tissues and organs of the human body are composed of cells. However, the life span of cells is limited. After senescence or apoptosis, new cells must be replenished. These new cells are produced by stem cells.