Olfaction is the sense of smell, which allows the perception of odors by chemoreception. It is a form of chemoreception. Olfaction has many purposes, such as the detection of hazards, pheromones, and food. It integrates with other senses to form the sense of flavor. Olfaction occurs when odorants bind to specific sites on olfactory receptors located in the nasal cavity (in mammals) or olfactory organs like antennae, maxillary palp etc (in insects).

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