title: Basal system of the ethmoidal labyrinth in man. I.
mesh_terms: D005004:Ethmoid Bone / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000196:embryology; D005260:Female; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011859:Radiography