Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
The philtrum is the vertical groove located on the upper lip, extending from the nose to the lip's top border. It is a noticeable feature in human facial anatomy that plays a minor role in speech and facial expression.
A cartilaginous structure that separates the nostrils and provides structural support to the nose.
Upper Lip: The upper part of the lips that covers the anterior teeth when closed and plays a key role in forming facial expressions and articulating sounds.
Respiratory Tract: The series of organs involved in taking in oxygen and expelling carbon dioxide; includes structures like the nose, mouth, throat (pharynx), larynx, trachea, bronchi, and lungs