Endolymphatic duct connects which structure -
Endolymphatic duct – It is a part of membranous labyrinth (Scala media)

It is formed by union of saccule and utricle
It connects scala media to subdural space
Its terminal part is dilated to form the endolymphatic sac
Endolymphatic sac lies between the two layers of dura on the posterior surface of petrous bone
Surgical importance – Endolymphatic sac is exposed for drainage or shunt operation in Meniere’s disease

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Ductus reuniens – connects cochlear duct to saccule
Aqueduct of cochlea – connects scala tympani to subarachnoid space
Scala media to subdural space
Scala vestibuli to aqueduct of cochlea
Scala tympani to aqueduct of cochlea
Scala tympani to subdural space