Jacobson's organ in man

Functions as excretory organ

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Functions as gustatory organ

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Is a vestigial organ

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None of the above

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Solution

The correct option is C Is a vestigial organ
Rodents and other mammals secrete chemical signals, called as pheromones, that are detected by a specialized sensory system, the vomeronasal organ (VNO), which consists of a pair of structures, that nestle in the nasal lining or the roof of the mouth. This is also called as Jacobson's organs, which is however vestigial in human.

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