Anterior nasal aperture
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| Anterior nasal aperture | |
|---|---|
| Latin | a. piriformis |
| Gray's | subject #47 196 |
| Dorlands/Elsevier | a_51/12144737 |
The Anterior Nasal Aperture (or piriform 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.
It is bounded above by the inferior borders of the nasal bones; laterally by the thin, sharp margins which separate the anterior from the nasal surfaces of the maxillæ; and below by the same borders, where they curve medialward to join each other at the anterior nasal spine.
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