[1]: 508 Its proximal opening is situated inferoposteriorly in the pterygopalatine fossa.

[citation needed] Its distal opening is situated in the nasal cavity at the root of the pterygoid process near the lateral margin of the ala of vomer.

[citation needed] An inconstant vomerovaginal canal may lie between the ala of the vomer and the vaginal process of the sphenoid bone, medial to the palatovaginal canal, and lead into the anterior end of the palatovaginal canal.

[citation needed] The pharyngeal branch of the maxillary artery supplies the nasopharynx,[citation needed] posterior part of the roof of the nasal cavity, sphenoid sinus, and pharyngotympanic tube.

[2] This article incorporates text in the public domain from page 180 of the 20th edition of Gray's Anatomy (1918)