Which of the following is NOT a part of the respiratory tract order from the mouth?

The correct answer identifies the bronchi as not being part of the immediate order of the respiratory tract that follows the mouth. The respiratory tract begins with the mouth (or nose), which leads into the pharynx. From the pharynx, the air travels down to the larynx. Following the larynx, the path continues to the trachea, which then branches into the bronchi that enter the lungs.

Thus, while the bronchi are indeed crucial components of the respiratory system, they are located further along the pathway after the trachea. This makes them distinct from the other structures mentioned, which are located directly in the pathway of air moving from the mouth down into the lungs.