Registered Nurse (RN) Respiratory Practice Exam

Question: 1 / 400

Which structure is NOT part of the lower respiratory system?

Trachea

Carina

Pharynx

The pharynx is considered part of the upper respiratory system rather than the lower respiratory system. The lower respiratory system includes structures involved in gas exchange and the conduction of air to the lungs. This encompasses the trachea, which serves as a primary airway leading into the lungs; the carina, which is the ridge at the base of the trachea where it bifurcates into the bronchi; and the bronchioles, which are the smaller branches of the bronchi that lead into the alveoli, where gas exchange occurs. The pharynx, on the other hand, is positioned above the larynx and plays a role in both the respiratory and digestive systems, being involved in the passage of air to the larynx and food to the esophagus. This distinction is crucial when studying respiratory anatomy, as understanding which structures belong to each section helps clarify their functions and relevance in respiratory health.

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Bronchioles

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