Crossing the under surface of the sphenoid the

sphenopalatine artery The sphenopalatine artery (nasopalatine artery) is an artery of the head, commonly known as the artery of epistaxis. Course The sphenopalatine artery is a branch of the maxillary artery which passes through the sphenopalatine foramen into the cavi ...

ends on the

nasal septum The nasal septum () separates the left and right airways of the nasal cavity, dividing the two nostrils. It is depressed by the depressor septi nasi muscle. Structure The fleshy external end of the nasal septum is called the columella or co ...

as the posterior septal branches; these anastomose with the ethmoidal arteries and the septal branch of the superior labial; one branch descends in a groove on the

vomer The vomer (; lat, vomer, lit=ploughshare) is one of the unpaired facial bones of the skull. It is located in the midsagittal line, and articulates with the sphenoid, the ethmoid, the left and right palatine bones, and the left and right max ...

to the

incisive canal The incisive canals (also: "''nasopalatine canals''") are two bony canals of the anterior hard palate connecting the nasal cavity and the oral cavity. An incisive canal courses through each maxilla. Below, the two incisive canals typically converg ...

and anastomoses with the

descending palatine artery The descending palatine artery is a branch of the third part of the maxillary artery supplying the hard and soft palate. Course It descends through the greater palatine canal with the greater and lesser palatine branches of the pterygopalatine gan ...

References

Arteries of the head and neck {{circulatory-stub