Choana of cranium
Choana cranii
- Latin synonym: Apertura nasalis posterior cranii
- Synonym: Posterior nasal aperture of cranium
- Related terms: Choana; Posterior nasal aperture
Definition
Choana is the posterior nasal aperture.The choanae are separated by the vomer. Choana is a space bounded as follows: anteriorly and inferiorly by the horizontal plate of palatine bone, superiorly and posteriorly by the sphenoid bone laterally by the medial pterygoid plates.