The Purpose Of This Groove Is Pretty Cool!

Did you know there is a vertical, narrow groove between the base of the nose and the top of a dog’s upper lip? It is called the philtrum, and it has a purpose.

Every time a dog licks his lips, a bit of saliva stays in this groove and is drawn upwards due to capillary action.

This keeps the dog’s nose moist, if not wet, which enables the dog to capture scent particles from the air. Pretty cool, eh?

Image from Wikicommons

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