Which organ is not involved in the process of hearing?

The semi-circular canals are not involved in the process of hearing; they play a crucial role in balance and spatial orientation. The semi-circular canals are part of the vestibular system located in the inner ear and are responsible for detecting rotational movements of the head. They contain fluid and sensory cells that help the body maintain equilibrium by sending signals to the brain about the position and movement of the head.

In contrast, the cochlea, organ of Corti, and the vestibule are directly involved in the hearing process. The cochlea is a spiral-shaped organ that converts sound vibrations into electrical signals that the brain interprets as sound. The organ of Corti is located within the cochlea and contains hair cells—sensory receptors that translate these vibrations into nerve impulses. The vestibule, while primarily responsible for equilibrium, also serves as a central hub for sound waves traveling toward the cochlea via the oval window.

Understanding the distinct roles of these structures highlights how hearing and balance, though closely related, utilize different anatomical components within the ear.