Vibrations of the vocal cords occur due to air exhaled from which part of the body?

• A. Bronchi
• B. Alveoli
• C. Lungs
• D. Trachea

Answer: (C)

The vibration of the vocal cords is primarily caused by air that moves through the larynx, which is located at the upper end of the trachea. As air is exhaled from the lungs, it travels up through the trachea toward the larynx. This airflow causes the vocal cords, which are located within the larynx, to vibrate. These vibrations produce sound, which is then modified by the tongue, lips, and other structures to form speech.

The lungs are the source of the air that is exhaled, making them essential for this process. However, it is the passage of air right above the lungs, through the trachea and into the larynx, that facilitates the actual vibration of the vocal cords. Together, the lungs and trachea work to produce sound, but the involvement of the lungs in generating air pressure is crucial to this vocalization process.