Which of the following is NOT a part of the digestive system?

The bronchi are not part of the digestive system; they are components of the respiratory system. The primary role of the bronchi is to conduct air to and from the lungs, facilitating the exchange of oxygen and carbon dioxide in the body. In contrast, the small intestine, liver, and gallbladder are integral parts of the digestive system.

The small intestine is where most digestion and nutrient absorption occurs. The liver plays a crucial role in digestion by producing bile, which aids in the emulsification of fats, and it processes nutrients absorbed from the digestive tract. The gallbladder stores and concentrates bile, releasing it into the small intestine to help with the digestion of fats. Understanding the distinct functions of each organ helps clarify why the bronchi do not belong to the digestive system.