ABAnterior ethmoidal arteryPosterior ethmoidal arterySuperior conchaMiddle conchaInferior conchaGreater palatine arteryPosterior lateral nasalbranches of sphenopalatine arterySphenopalatine arteryAlar branch oflateral nasal arteryExternal nasalartery from anteriorethmoidal arterySeptal branch ofanterior ethmoidal arterySeptal branch ofposterior ethmoidal arteryArea of significantanastomoses (proneto “nosebleeds”)Posterior septal branch ofsphenopalatine arteryTerminal part ofgreater palatine arterySeptal branch from nasalartery from superior labial artery