"Myoglobin is like an emergency oxygen source. Ordinarily oxygen would be carried in the haemoglobin of red blood cells. When the muscles are working, this oxygen source can be defective (hence anaerobic respiration). Muscle fibres contain the protein myoglobin, which is kind of like hemoglobin. Without going into any sort of detail, it give up its oxygen it is carrying easily and quickly to muscles allowing them to work longer and more efficiently during exercise."
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.