Stem cells are a class of undifferentiated cells that are able to differentiate into specialized cell types. Commonly, stem cells come from two main sources: -Embryos formed during the blastocyst phase of embryological development (embryonic stem cells) -Adult tissue (adult stem cells) Both types are generally characterized by their potency, or potential to differentiate into different cell types (such as skin, muscle, bone, etc.).
Another silly joke from your friends here at Neatorama. It works on so many levels, it critiques sleazy people with no culture and supports one of the most important building blocks of life – bacteria.