Question

Why do the walls of the trachea not collapse’when there is less air in it?​

Answer 1

Rings of cartilages are present in trachea. These rings support the trachea and do not allow the trachea to collapse when there is less air in it.

Answer 2

the walls of trachea have C shaped rings of cartilage which prevents it from collapsing when less air is in it.