![]() ![]() One type of adult stem cell is the epithelial stem cell, which gives rise to the keratinocytes in the multiple layers of epithelial cells in the epidermis of skin. They include the embryonic stem cells of the embryo, fetal stem cells of the fetus, and adult stem cells in the adult. There are different stem cells present at different stages of a human’s life. Stem cells are unique in that they can also continually divide and regenerate new stem cells instead of further specializing. In contrast, a unipotent cell is fully specialized and can only reproduce to generate more of its own specific cell type. An oligopotent stem cell is limited to becoming one of a few different cell types. A multipotent stem cell has the potential to differentiate into different types of cells within a given cell lineage or small number of lineages, such as a red blood cell or white blood cell.įinally, multipotent cells can become further specialized oligopotent cells. These cells then become slightly more specialized, and are referred to as multipotent cells. A pluripotent stem cell is one that has the potential to differentiate into any type of human tissue but cannot support the full development of an organism. The embryonic cells that develop from totipotent stem cells and are precursors to the fundamental tissue layers of the embryo are classified as pluripotent. The first embryonic cells that arise from the division of the zygote are the ultimate stem cells these stems cells are described as totipotent because they have the potential to differentiate into any of the cells needed to enable an organism to grow and develop. Stem cells are divided into several categories according to their potential to differentiate. \)Ī stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells.
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