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प्रश्न
Why do the walls of trachea not collapse when there is less air in it?
लघु उत्तरीय
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उत्तर
The walls of the trachea do not collapse when there is less air because they are supported by 16 to 20 C-shaped rings of hyaline cartilage. These rigid, springy rings provide structural support to keep the airway permanently open.
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