Choanae
Choanae
Definition
The choanae -or guttural openings of the nasal cavities- constitute together an elongated eliptic depression in the great axis of the head. and at the bottom of which appears the vomer, that separates them from each other.
Their caudal border is formed by the wings of the vomer and the body of the presphenoid bone. They are limited on each side by the pterygoid process of the sphenoid bone and the perpendicular plate of the palatine bone.
These formations are completed on their medial surface by the pterygoid bone.
References
Anatomie comparée des mammifère domestiques - 5th edition - Robert Barone - Vigot
