Corpus: Choana
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from ancient Greek: χοάνη ("choanae") - funnel
Synonym: choana
English: , posterior nasal aperture, funnel
Definition[Bearbeiten]
The choanae are the posterior, paired openings of the nasal cavity (cavum nasi). The inferior nasal meatus and the nasal cavity open into the nasopharynx via them.
Not to be confused with: Concha nasalis (nasal concha).
Anatomy[Bearbeiten]
The choanae are located at the base of the skull. They are delimited as follows:
- anterior and inferior: by the horizontal lamina of the palatine bone
- superior and posterior: from the anterior part of the sphenoid bone
- lateral: from the lamina medialis of the pterygoid process of the sphenoid bone
The vomer (ploughshare bone) separates the left and right choanae.