What is the name of the tube that air travels down after it leaves the larynx?

The tube that air travels down after it leaves the larynx is the trachea. The trachea, commonly known as the windpipe, serves as the main airway that connects the larynx to the bronchi, which subsequently lead to the lungs. Its structure is supported by rings of cartilage that keep the airway open, allowing for the unimpeded passage of air during both inhalation and exhalation.

In the context of respiratory anatomy, after air passes through the larynx, it must travel through the trachea to reach the lungs. The trachea branches into two main bronchi that enter the lungs, where the air is distributed to the various lobes and smaller airways. Other options such as lungs and bronchi relate to the subsequent stages of airflow but do not represent the direct pathway from the larynx. The aorta, on the other hand, is a major artery that carries blood away from the heart, and it is not involved in the respiratory process at this stage. Therefore, the trachea is the correct answer as it is the direct continuation of the airway after the larynx.