mucous lining of the small intestine
"The function of the mucous lining of the small intestine is like a window screen which lets air in but keeps bugs out. It also resembles the skin, in that it sloughs off a layer of cells naturally every 3 to 5 days and grows new cells to keep the lining semi-permeable. "
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.