Anterior nasal aperture

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Anterior nasal aperture
Latin Apertura piriformis
Gray's p.196
TA A02.1.00.088
FMA 53137
Anatomical terminology

The anterior nasal aperture (piriform or pyriform aperture) is a heart- or pear-shaped opening in the skull. Its long axis is vertical, and narrow end upward; in the recent state it is much contracted by the lateral nasal cartilage 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 maxilla; and below by the same borders, where they curve medialward to join each other at the anterior nasal spine.


This article incorporates text from a public domain edition of Gray's Anatomy.