Which of the following correctly defines stem cells?

Stem cells are defined as undifferentiated cells that possess the unique ability to self-renew and differentiate into various specialized cell types. This versatility is a hallmark of stem cells, allowing them to develop into many different tissues in the body. They play a crucial role in growth, development, and tissue repair.

Unlike fully differentiated cells, which have specific functions and characteristics tailored to their roles in the body, stem cells maintain the potential to transform into different cell types. Their ability to self-renew means they can undergo numerous cycles of cell division while remaining undifferentiated, providing a continuous supply of cells for growth and repair as needed.

Although it's true that some cells may divide under stress or have restrictions based on their functions, these definitions do not encapsulate the core attributes of stem cells. Thus, identifying them as undifferentiated cells capable of self-renewal is essential in understanding their biological significance and potential applications in regenerative medicine.