Which of the following structures contains the vocal cords?
A.
Trachea
B.
Pharynx
C.
Larynx
D.
Epiglottis
The Correct Answer and Explanation is:
The correct answer is C. Larynx.
Explanation:
The larynx, commonly known as the voice box, is the structure that houses the vocal cords. It is a vital component of the respiratory system and plays a crucial role in sound production, breathing, and protecting the trachea against food aspiration.
- Anatomy of the Larynx: The larynx is located in the anterior part of the neck, just below the pharynx and above the trachea. It is composed of several cartilages, including the thyroid cartilage (which forms the Adam’s apple), cricoid cartilage, and the arytenoid cartilages. The vocal cords, or vocal folds, are situated within the larynx and are composed of multiple layers, including a mucous membrane, a vocal ligament, and vocalis muscle.
- Function of Vocal Cords: The vocal cords are essential for phonation (sound production). When air is pushed from the lungs through the trachea, it passes through the glottis (the space between the vocal cords). The vocal cords can be tensed, relaxed, or adjusted in position to modulate pitch and volume. Vibrations of the vocal cords produce sound waves, which are then modified by the articulatory structures (tongue, lips, and palate) to form speech.
- Other Structures:
- Trachea: This is the airway that extends from the larynx and branches into the bronchi of the lungs. It does not contain the vocal cords but serves as the conduit for air to reach the lungs.
- Pharynx: This is the part of the throat behind the mouth and nasal cavity, extending to the esophagus and larynx. It plays a role in both the respiratory and digestive systems but does not house the vocal cords.
- Epiglottis: This is a flap-like structure that covers the opening of the larynx during swallowing to prevent food and liquids from entering the airway. It does not contain the vocal cords but assists in protecting the larynx.
In summary, the larynx is the specific structure within the throat that contains the vocal cords and is responsible for sound production and protecting the lower respiratory tract.