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MHT CET Medical202622 April 2026Morning ShiftBiologyBreathing and Exchange of GasesActual

Which one of the following prevents the collapsing of the trachea even when there is no air?

Options

  1. APseudostratified epithelium.
  2. BCartilagenous rings.
  3. CDiaphragm.
  4. DThoracic ribs.

Correct answer

B. Cartilagenous rings.

Step-by-step solution

The trachea is a straight tube extending up to the mid-thoracic cavity, which divides at the level of the 5th thoracic vertebra into a right and left primary bronchi. The trachea, primary, secondary and tertiary bronchi, and initial bronchioles are supported by incomplete cartilaginous rings. These C-shaped rings of hyaline cartilage provide structural support and prevent the trachea from collapsing even when there is no air in it. Answer: Cartilagenous rings.

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