What is true about tracheal cartilages?

What is true about tracheal cartilages?

• A. Allows for voice modulation
• B. Maintains structure of the airway
• C. Prevents food from entering airways
• D. Secretes mucus to warm air

Answer: (B)

The statement about tracheal cartilages that is accurate is that they maintain the structure of the airway. The trachea is a tube that connects the larynx to the bronchi, and its walls are supported by C-shaped rings of hyaline cartilage. These cartilages prevent the trachea from collapsing, ensuring that the airway remains open for unobstructed airflow to and from the lungs. This structural integrity is crucial for effective respiration, particularly during activities such as coughing or heavy breathing, where changes in pressure can occur.

The other options pertain to functions that are not performed by the tracheal cartilages. Voice modulation is primarily controlled by the vocal cords located in the larynx. Preventing food from entering the airways is a function of the epiglottis during swallowing, which covers the trachea to direct food to the esophagus. Mucus secretion is carried out by goblet cells within the respiratory epithelium lining the trachea, helping to trap debris and humidify the air entering the lungs, rather than being a function of the cartilages themselves.