What is the name of the windpipe that branches into right and left primary bronchus?

The windpipe that branches into the right and left primary bronchus is known as the trachea. This structure serves as the main passageway for air to travel from the upper respiratory tract into the lungs. The trachea is situated behind the larynx and runs down into the chest, where it bifurcates into the primary bronchi, allowing air to enter each lung.

Understanding the anatomy is crucial, as the trachea's role is vital in proper respiratory function, ensuring that air is effectively delivered to the lungs for gas exchange. The other structures listed, such as the esophagus, larynx, and bronchioles, serve different functions in the respiratory or digestive systems and do not fulfill the specific role of the windpipe.