The cartilage provides support to the trachea which does not collapse even when there is less air in it.The trachea or the windpipe is a cartilaginous cylinder that interfaces the pharynx and larynx to the lungs, permitting the entry of air, as is available in practically all air-breathing creatures with lungs.The trachea reaches out from the larynx and branches into the two essential bronchi. At the top of the trachea, a completed ring of cartilage is located, which protects it from getting damaged or collapsed when the flow of air is inadequate.