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biological

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cochlear duct

cochlear duct The cochlear duct is a spiral, endolymph-filled tube inside the bony cochlea.

The cochlear duct is a spiral, endolymph-filled tube inside the bony cochlea. It starts at the vestibule, winds about two and a half turns around the modiolus, and separates the surrounding perilymph-filled space into the scala vestibuli and scala tympani.