Assertion (A): Tracheae, primary, secondary and tertiary bronchi … - Vidyadip

MCQ

Assertion (A): Tracheae, primary, secondary and tertiary bronchi are supported by incomplete cartilaginous rings.
Reason (R): These rings of cartilage make the wall non-collapsible.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.

✓

Answer

(a) Both A and R are true and R is the correct explanation of A.
Explanation: The cartilage rings are present in the trachea to prevent it from collapsing. This enables the lumen of trachea to stay open during breathing.

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