what substance is found in the cochlear duct?
Cochlear fluids. The cochlear canals contain two types of fluid: perilymph and endolymph. Perilymph has a similar ionic composition as extracellular fluid found elsewhere in the body and fills the scalae tympani and vestibuli. Endolymph, found inside the cochlear duct (scala media), has a unique composition not found elsewhere in the body. Composition of the cochlear fluids A remarkable characteristic of the cochlea is the unique composition of endolymph.