Zenker's diverticulum is an outpouching of which organ?

Zenker's diverticulum is specifically an outpouching that occurs in the esophagus, which is the muscular tube that connects the throat (pharynx) with the stomach. This condition typically develops in an area of weakness in the esophageal wall, usually above the upper esophageal sphincter, leading to the formation of a diverticulum that can collect food particles and lead to symptoms such as difficulty swallowing, regurgitation, and halitosis.

The other options represent different organs that do not form Zenker's diverticulum. The stomach is responsible for digesting food, the duodenum is the first section of the small intestine, and the colon is part of the large intestine involved in waste processing. Zenker's diverticulum is distinctively related to the esophagus, making this option the correct answer for identifying the specific organ involved.