each nerve cell
"Electric shock can cause a muscle twitch only because it can cause the nerves to fire. We can measure a current off of nerves because they work by a flow of ions through a membrane, but they still arent the same thing as an electrical wire carrying a current. Each nerve cell is like a little power plant and their only function is to tell the next nerve in line to do the same thing that it just did. "
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.