Is it similar to the appendix which afaik serves no purpose?
In: Biology
It’s called the philtrum. https://en.wikipedia.org/wiki/Philtrum
It is not known to have a use for people but it exists in nearly all mammals and is part of the evolutionary blueprint, so to speak. The philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. That is, it helps smell/taste. It is obvious on dogs, where it is functional.
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