You searched for: “choana
choana (s), chonae (pl)
An oval aperture on each side of the posterior border of the nasal septum, communicating each nasal fossa with the nasal pharynx.

The bony constituent of these openings are the choanae osseae, comprising on each side the horizontal plate of the palatine bone below, the base of the skull above, and laterally the medial pterygoid plate.

This entry is located in the following unit: flagello-, flagell- (page 1)