The palatovaginal artery and the vidian artery. The vidian artery is an artery in the vidian canal. The origin of the vidian artery could be very various. It can arise from either interal carotid artery or external carotid artery. In this case, the palatovaginal artery and the vidian artery have a common trunk that arises from the sphenopalatine artery. (Image courtesy of JC Fernandez-Miranda)