The anterior nasal aperture (or piriform/pyriform aperture) is a heart-shaped or pyriform opening, whose long axis is vertical, and narrow end upward; in the recent state it is much contracted by the lateral and alar cartilages of the nose.
The anterior nasal aperture (or piriform/pyriform aperture) is a heart-shaped or pyriform opening, whose long axis is vertical, and narrow end upward. It is much contracted by the lateral and alar cartilages of the nose. This was in the recent state.