Which structure located within the trachea contains vocal cords and plays a role in sound production?

• A. Cornea
• B. Larynx
• C. Pharynx
• D. Nasal cavity

Answer: (B)

The larynx, located at the upper part of the trachea, is essential for sound production because it contains the vocal cords (also called vocal folds). These cords are muscle-controlled structures that can open and close, allowing for the modulation of airflow from the lungs. When air passes through the closed vocal cords, they vibrate, producing sound. The tension and length of the vocal cords can be adjusted to create different pitches of sound, making the larynx a fundamental component of voice and speech.

In addition to sound production, the larynx also serves as a passageway for air to enter the trachea while providing protection to the lower airway by preventing foreign objects from entering the trachea and lungs. Thus, its role in both breathing and phonation is vital for effective communication.