What is Endolymphatic duct connects which structure - and explain in detail?
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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