What might happen if the trachea didn't have rings of cartilage?

If the trachea didn't have rings of cartilage, it would lack structural support and become prone to collapse, especially during breathing when negative pressure is generated. This could obstruct airflow to the lungs, leading to breathing difficulties and potential respiratory failure. Additionally, without the rigidity provided by the cartilage, the trachea would be more susceptible to injury and damage from external forces or pressure. Overall, the absence of cartilage rings would severely compromise the trachea's functionality and respiratory health.