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Sense of smell is the ability to detect odors.
The organ of smell consists of a group of sensitive cells situated in the upper part of the nasal cavity, which is connected to the brain by the olfactory nerve. The sense of smell is not well developed in humans. It is limited to the sensation of seven basic odors and their combinations. It is, however, an important contributory factor to the sense of taste. Like the sense of taste, it becomes less acute as a person becomes older.