It is separated from the tympanic duct (scala tympani) by the basilar membrane.

[2] The stria vascularis is located in the wall of the cochlear duct.

[2] The cochlear duct develops from the ventral otic vesicle (otocyst).

[3] The organ of Corti develops inside the cochlear duct.

[6] Rarely, the cochlear duct may develop to have the wrong shape.