"A stomata is like a plant's mouth, and it looks like one, too. A plant will have hundreds to thousands of stomata on a leaf, usually on the underside."
The association with the nose is a bit more relevant than a mouth. The human mouth is for gas exchange and solid food. The human nose is mostly used for the exchange of gas(C02).
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.