Scala tympani:

cross-section of the cochlea with an arrow designating the scala tympani.

cross-section of the cochlea with an arrow designating the scala tympani.

one of the three canals found in the cochlea; the scala tympani ends at the membrane of the round window.

Learn more: Know your brain - Cochlea

Watch this 2-Minute Neuroscience video to learn more about the cochlea.