What are stem cells? Biology GCSE answer?
Stem cells are special cells that have not decided what they are yet. Stem cells can form any body part, including body parts that normally don’t regenerate. If you can control the stem cells and inject them then you can do things like regrow kidneys or a liver, or make better bone and skin repairs. According to Wikipedia: http://en.wikipedia.org/wiki/Stem_cells “Stem cells are cells found in most, if not all, multi-cellular organisms.