They grew other kinds of cells in the medium, such as human skin cells, but these induced no such attraction in the worms. (newscientist.com)
There are some cells in the bodies of adults than can differentiate into other kinds of cells. (bioedonline.org)
Stem cells not only bolster their own numbers but also become other kinds of cells through a process called differentiation, thereby keeping an organ populated as mature cells die off. (sciencenews.org)