Anterior nasal aperture

The anterior nasal aperture (piriform or pyriform aperture) is a heart- or pear-shaped opening in the human skull. Its long axis is vertical, and narrow end upward; in the recent state it is much contracted by the lateral nasal cartilage and the greater and lesser alar cartilages of the nose.

单词	Piriform aperture
释义	Piriform aperture 英语百科 Anterior nasal aperture The anterior nasal aperture (piriform or pyriform aperture) is a heart- or pear-shaped opening in the human skull. Its long axis is vertical, and narrow end upward; in the recent state it is much contracted by the lateral nasal cartilage and the greater and lesser alar cartilages of the nose.
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Piriform aperture

Anterior nasal aperture