Endolymph in ear equivalent to

The inner ear (labyrinth) is made up of two pas, one within the other. The bony labyrinth is a series of channels in the Petros poion of the temporal bone. Inside these channels, surrounded by a fluid called perilymph, is the membranous labyrinth. This membranous structure more or less duplicates the shape of the bony channels. It is filled with a K+rich fluid called endolymph, and there is no communication between the spaces filled with endolymph and those filled with perilymph.Reference: Ganong review of medical physiology 23rd edition Page no; 205