4.Why do the walls of the trachea not collapse when there is less air in it? Share with your friends Share 1 Jahirul Mazumder answered this Please refer the link below: https://www.meritnation.com/ask-answer/question/what-is-the-funtion-of-trachea-why-do-its-walls-not-colla/life-processes/1196952 1 View Full Answer Vyankatesh Muley answered this Presence of ring of cartilage prevents trachea from collapsing. 0 Somya answered this because it is surrounded by c shaped cartiligious rings they make trachae open even if less air is in it. 0 Abhilash V answered this The walls of trachea are supported by 16 - 20 'C' shaped cartilagenous rings. That is the reason why the trachea doesn't collapse 0