Basal cells are a type of cell found in the deepest layer of the epidermis, which is the outermost layer of the skin. They play a crucial role in the skin's ability to regenerate and repair itself. Basal cells continuously divide to produce new cells, which then move up to the surface, replacing dead or damaged cells. These cells are essential for maintaining the skin's structure and function. When basal cells become damaged or abnormal, they can lead to skin conditions, including basal cell carcinoma, a common form of skin cancer. Regular skin checks can help detect any unusual changes in these cells.