NASAL SEPTUM Internal Carotid System 1. Anterior ethmoidal aery 2. Posterior ethmoidal aery External Carotid System Branches of ophthalmic aery 1. Sphenopalatine aery (branch of maxillary aery) gives Nasopalatine and posterior medial nasal branches. 2. Septal branch of greater palatine aery (branch of maxillary aery). 3. Septal branch of superior labial aery (branch of facial aery). LATERAL WALL Internal carotid System 1. Anterior ethmoidal 2. Posterior ethmoidal External Carotid System Branches of ophthalmic aery 1. Posterior lateral nasal branches 2. Greater palatine aery 3. Nasal branch of anterior superior dental 4. Branches of facial aery To nasal vestibule From sphenopalatine aery From maxillary aery From infraorbital branch of maxillary aery