Answer:
Stem cells are self-renewal undifferentiated cells present in the human body. Undifferentiated means that they can divide and differentiate into many cell types of the body depending upon the differentiating potency of the stem cell.
If scientists could regulate the process of differentiation, they can able to differentiate a stem cell into a cell type of interest such as cardiac cell.
These cells are then can be used to replace the damaged or dead cells present in the body.
Thus, it can help in the treatment of diseases such as cardiovascular disease.