Which structures are listed as protective components of the airway?

Which structures are listed as protective components of the airway?

• A. Epiglottis, Cilia, Ribcage
• B. Diaphragm, Intercostal muscles, Pleura
• C. Nose, Larynx, Trachea
• D. Alveoli, Capillaries, Alveolar sacs

Answer: (A)

Protecting the airway relies on mechanisms that prevent entry of food, liquids, or debris and on structures that shield the airway from injury. The epiglottis acts as a lid over the opening of the trachea during swallowing, so what you swallow doesn’t spuriously enter the airway. The cilia lining the airways work with mucus to trap inhaled particles and sweep them upward out of the respiratory tract, helping keep the airway clear. The ribcage provides a protective bony enclosure around the lungs and airways, safeguarding these structures from trauma and helping maintain a stable space for breathing. Other options include muscles and membranes that are essential for breathing mechanics or tissues that cover and support the lungs, but they aren’t the primary protective components of the airway, and the alveoli or capillaries are involved in gas exchange rather than protection.

Protecting the airway relies on mechanisms that prevent entry of food, liquids, or debris and on structures that shield the airway from injury. The epiglottis acts as a lid over the opening of the trachea during swallowing, so what you swallow doesn’t spuriously enter the airway. The cilia lining the airways work with mucus to trap inhaled particles and sweep them upward out of the respiratory tract, helping keep the airway clear.

The ribcage provides a protective bony enclosure around the lungs and airways, safeguarding these structures from trauma and helping maintain a stable space for breathing.

Other options include muscles and membranes that are essential for breathing mechanics or tissues that cover and support the lungs, but they aren’t the primary protective components of the airway, and the alveoli or capillaries are involved in gas exchange rather than protection.