““Glial cells include Schwann cells, Müller cells, epithelial cells, ependymal cells, oligodendricytes, tanycytes, microglia, and astrocytes—all function as differently from each other as they do from neurons. Students of scientific fields always claim that learning new terms in the field is like learning a new language. Just as the meaning of an English word can change over time (such as plane, buck, mouse, and gay), the meaning of a scientific label can change after its function is understood. As functions of cells are understood, the labels have remained. Glia are capable of signaling and communicating, but they will always be referred to as glia (glue). Virchow’s “glue” label sticks because it was originally believed that a neuron was the only cell able to signal and communicate. As we can see by the confusing nature of the “planet” Pluto, it””
