Which structure acts as a pressure-relief mechanism in the cochlea?

The round window serves as a crucial pressure-relief mechanism in the cochlea. When sound waves create pressure in the fluid-filled cochlea, the movement of the inner ear structures, especially in relation to the oval window, can generate excess pressure. The round window, located on the opposite side of the oval window, allows for the displacement of fluid within the cochlea. As the oval window membrane moves in response to sound vibrations, the round window membrane bulges outward to relieve this increased pressure, ensuring that the fluid can move freely and that sound stimuli can be effectively transduced into neural signals. This function is vital for maintaining the balance of pressure within the cochlear fluid and enabling our auditory system to function correctly.