Olfactory system

The olfactory system is the sensory system used for the sense of smell (olfaction). Olfaction is one of the special senses directly associated with specific organs. Most mammals and reptiles have a main olfactory system and an accessory olfactory system.

The main olfactory system detects airborne substances, while the accessory system senses fluid-phase stimuli.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY 2.5

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