The vestibular and cochlear aqueduct.
D003051:Cochlea / Q000033:anatomy & histology*; D003052:Cochlear Aqueduct / Q000033:anatomy & histology*; D006801:Humans; D008953:Models, Anatomic; D014723:Vestibular Aqueduct / Q000033:anatomy & histology*; D014722:Vestibule, Labyrinth / Q000033:anatomy & histology*