What keeps the airway open in the trachea?

• A. Cricoid cartilage
• B. By the presence of bronchioles
• C. Tracheal cartilages
• D. Thyroid cartilage

Answer: (C)

The trachea, commonly known as the windpipe, is maintained in an open position by structural support from tracheal cartilages. These cartilages are C-shaped rings that encircle the trachea, providing rigidity and ensuring that the airway remains patent (open) despite changes in pressure that may occur during breathing. The open portion of the C-shaped rings faces the esophagus, allowing for flexibility while preventing the trachea from collapsing during inhalation and exhalation.

The tracheal cartilages are crucial for protecting the airway from obstruction, as they prevent the trachea from collapsing under pressure changes and allow for unobstructed airflow to and from the lungs. This structural integrity is vital for the efficient functioning of the respiratory system, enabling adequate airflow and gas exchange.