The fact is the sense of smell is just as good in humans as in other mammals like rodents and dogs humans can discriminate maybe one trillion different odors he says which is far more than. Often being vastly underrated the human sense of smell plays an essential role in our life eg in food acceptance fragrance appreciation and as a warning device for spoiled food toxic gases and the presence of fire the book provides a multidisciplinary up to date review of the structure and function of the sense of smell and of how it is . The sense of smell like taste and trigeminal senses is a chemical sense dedicated to the perception of chemical stimulations and to the generation of responses to them. Humans tested as generally more sensitive sniffers than monkeys and rats on a limited range of odors in fact humans detected certain scents at lower concentrations than the notoriously top notch nostrils of mice and pigs humans even beat the indomitable dog for at least a handful of scents
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