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Sense of smell
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The sense of smell, or olfaction, is the special sense through which smells are perceived. The sense of smell has many functions, including detecting desirable foods, hazards, and pheromones, and plays a role in taste.
Painting of a woman smelling a carnation. Olfaction uses chemoreceptors that create signals processed in the brain that form the sense of smell.
Painting of a woman smelling a carnation. Olfaction uses chemoreceptors that create signals processed in the brain that form the sense of smell.
The Lady and the Unicorn, a Flemish tapestry depicting the sense of smell, 1484–1500. Musée national du Moyen Âge, Paris.
The Lady and the Unicorn, a Flemish tapestry depicting the sense of smell, 1484–1500. Musée national du Moyen Âge, Paris.
Odor
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An odor or odour is caused by one or more volatilized chemical compounds that are generally found in low concentrations that humans and many animals can perceive via their sense of smell. An odor is also called a "smell" or a "scent", which can refer to either an unpleasant or a pleasant odor.
"Smell", from Allegory of the Senses by Jan Brueghel the Elder, Museo del Prado
"Smell", from Allegory of the Senses by Jan Brueghel the Elder, Museo del Prado
Odor control covers at a sewage treatment plant: Under these covers, grit and gravel are settled out of the wastewater.
Odor control covers at a sewage treatment plant: Under these covers, grit and gravel are settled out of the wastewater.