Tracheal Rings 15-20 — FRCA Primary MCQ

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EasyAnatomyTracheal Rings 15-20FRCA Primary

Regarding the anatomy of the airway the number of tracheal cartilage rings is approximately:

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Correct answer: E — 15-20

The trachea contains approximately 15-20 C-shaped (incomplete posteriorly) cartilaginous rings. Each ring is approximately 4 mm tall and separated by fibrous tissue. The posterior wall is membranous (trachealis muscle). The trachea is approximately 10-12 cm long in adults with an internal diameter of approximately 2 cm.

Reference: RCoA 2021 Primary FRCA Curriculum