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Stem cell

Stem cells are undifferentiated biological cells that can differentiate into specialized cells and can divide (through mitosis) to produce more stem cells. They are found in multicellular organisms. In mammals, there are two broad types of stem cells: embryonic stem cells, which are isolated from the inner cell mass of blastocysts, and adult stem cells, which are found in various tissues. In adult organisms, stem cells and progenitor cells act as a repair system for the body, replenishing adult tissues. In a developing embryo, stem cells can differentiate into all the specialized cells—ectoderm, endoderm and mesoderm (see induced pluripotent stem cells)—but also maintain the normal turnover of regenerative organs, such as blood, skin, or intestinal tissues.

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Stem Cells Repair Damaged Vision!

Did you know that stem cells can be used in ways other than injecting them into the human body in some way? In Thailand, scientists have found a way to incorporate mesenchymal stem cells into contact lens to restore vision. Wow!

Contributed by Abigail Waverly Hull

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