"In effect, the choroid plexus is like a "kidney" for the brain: it maintains the chemical stability of the CSF in much the same way that the kidneys maintain the stability of the blood."
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.