Question

The term for the human “Voice box”

• A. Pharynx
• B. Larynx
• C. Vocal cords
• D. Ovula

Answer 1

Answer:

B. Larynx

Anatomy of the Human Voice Box

The Larynx

• The Larynx, commonly known as the voice box, is a cartilaginous structure located in the neck, anterior to the esophagus and superior to the trachea.
• It plays a crucial role in breathing, producing sound (phonation), and protecting the trachea against food aspiration.
• The larynx is primarily composed of nine pieces of cartilage: three single cartilages (the thyroid, cricoid, and epiglottis) and six paired cartilages (the arytenoid, corniculate, and cuneiform).
• Within the larynx are the vocal folds (or vocal cords), which are folds of mucous membrane that cover a ring of fibrous tissue and muscle.
• When air is expelled from the lungs, it passes through the larynx, causing the vocal folds to vibrate. This vibration produces the basic sound of the voice.
• The pitch of the voice is controlled by the tension and length of the vocal folds, which are adjusted by intrinsic laryngeal muscles.
• The epiglottis, a flap of cartilage, acts as a lid over the larynx, closing off the airway during swallowing to prevent food or liquid from entering the lungs.

Physiology of Sound Production

• Phonation is the process by which the vocal folds vibrate to produce sound.
• The sound produced by the vocal folds is a raw, voiceless sound that is modified by the resonators of the vocal tract (pharynx, oral cavity, and nasal cavity) to create distinct speech sounds.
• The thyroid cartilage is the largest cartilage and forms the Adam's apple, a prominent feature in adult males.
• The cricoid cartilage is the only complete ring of cartilage in the respiratory tract and forms the base of the larynx.
• The arytenoid cartilages are pyramid-shaped cartilages that articulate with the cricoid cartilage and are essential for the movement of the vocal folds.

Clinical Significance

• Problems affecting the larynx can lead to voice disorders such as hoarseness, loss of voice (aphonia), or pain during speaking.
• Conditions like laryngitis (inflammation of the larynx), vocal nodules, polyps, and cancer are serious concerns related to this organ.