An opening in the bony labyrinth of the inner ear that exposes the membranous wall of the tympanic duct to the air of the middle ear cavity.
fenestra leading into the cochlea
membrane separating the middle ear and inner ear.
An opening in the cochlea that allows pressure from sound waves to be released.
The round window is one of two membranes that separates the inner ear from the middle ear. (The oval window is the other. The oval window leads to the scala vestibuli, which leads to the helicotrema, which leads to the scala tympani, which leads to the round window.)