[[Image:Choana and Infundibulum Avain.jpg|thumb|right|250px|Anatomy of the Avian Hard Palate showing the Choanal opening into the Infundibulum - RVC 2008]] | [[Image:Choana and Infundibulum Avain.jpg|thumb|right|250px|Anatomy of the Avian Hard Palate showing the Choanal opening into the Infundibulum - RVC 2008]] |