Flavor is a combination of taste {sensory input from the surface of the tongue} and smell, but mostly it's the latter. Humans perceive five tastes-sweet, bitter, salty, sour, and umami {brothy}-and an almost infinite number of smells. Eighty to ninety percent of the sensory experience of eating is olfaction.
( Mary Roach )
[ Gulp: Adventures on the ]
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