Which structure is located behind the oval window and leads to the cochlea?

The structure located behind the oval window that leads to the cochlea is the vestibule. The vestibule is part of the inner ear and acts as a central hub that connects to several important components, including the cochlea and the semicircular canals.

When sound waves enter the inner ear through the oval window, they subsequently create mechanical movements that propagate through the structures of the inner ear. The vestibule plays a crucial role in the balance and hearing mechanisms, providing a connection to the cochlea, where mechanical energy from sound waves is transduced into neural signals for auditory perception.

In contrast, the cochlear duct is a specific part of the cochlea that contains the organ of Corti, which is responsible for converting vibrations into neural impulses. The round window serves as another membrane that releases pressure, helping to accommodate the fluid movements within the cochlea but does not directly lead to it. The auditory canal is part of the outer ear and is not involved in the structure of the inner ear.