Philtrum
Vertical groove in the middle area of the upper lip, common to many mammals, extending in humans from the nasal septum to the tubercle of the upper lip
Nº Q152092 ★★
Uncommon · Knowledge
Philtrum
Vertical groove in the middle area of the upper lip, common to many mammals, extending in humans from the nasal septum to the tubercle of the upper lip
The philtrum (Latin: philtrum; from Ancient Greek φίλτρον (phíltron) 'love charm') or medial cleft is a vertical indentation in the middle area of the upper lip, common to therian mammals, extending in humans from the nasal septum to the tubercle of the upper lip. Together with a glandular rhinarium and slit-like nostrils, it is believed to constitute the primitive condition for at least therian mammals.
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From Wikipedia
The philtrum (Latin: philtrum; from Ancient Greek φίλτρον (phíltron) 'love charm') or medial cleft is a vertical indentation in the middle area of the upper lip, common to therian mammals, extending in humans from the nasal septum to the tubercle of the upper lip. Together with a glandular rhinarium and slit-like nostrils, it is believed to constitute the primitive condition for at least therian mammals. Monotremes lack a philtrum, though this could be due to the specialised, beak-like jaws in living species.
Text: Wikipédia, CC BY-SA 4.0. · Image: Mikael Häggström (CC BY-SA 3.0) ·