Which structure contains the vocal cords and contributes to sound production?

• A. Bronchi
• B. Larynx
• C. Diaphragm
• D. Trachea

Answer: (B)

Sound production relies on the larynx, the voice box that houses the vocal cords. As air from the lungs passes through the vocal cords, they vibrate, creating sound. The tension and length of the cords, adjusted by laryngeal muscles, determine pitch, while the size of the opening (glottis) influences volume. The larynx sits above the trachea and also helps protect the airway during swallowing.

Bronchi are air passages that deliver air into the lungs, not involved in vibrating to produce sound. The trachea conducts air from the larynx to the bronchi but doesn’t generate sound. The diaphragm is the primary muscle of breathing, changing thoracic volume to move air in and out, not directly producing voice.