endolymphatic duct
Quick Summary
The endolymphatic duct is a narrow channel within the inner ear that connects the membranous labyrinth to the cranial cavity. This duct carries excess endolymph, a fluid unique to the inner ear with a high concentration of potassium ions. The endolymph fills the membranous labyrinth, which is surrounded by perilymph, another fluid with a different ionic composition. The endolymphatic duct plays a role in the absorption of endolymph by the endolymphatic sac, contributing to the regulation of inner ear fluid volume and composition. The precise mechanisms of endolymph formation and maintenance are still being researched.12
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