Where does the undigested food pass for eventual elimination?

Where does the undigested food pass for eventual elimination?

• A. Small intestine
• B. Stomach
• C. Esophagus
• D. Colon

Answer: (D)

The key idea is where undigested material ends up for elimination: it moves into the colon, the large intestine, where water is reabsorbed and the remaining material is formed into stool before being expelled through the rectum. The esophagus simply transports swallowed food to the stomach; the stomach starts digestion with acid and enzymes; the small intestine is where most digestion and nutrient absorption occur. Once the nutrients are extracted, what remains passes into the colon to be eliminated.

The key idea is where undigested material ends up for elimination: it moves into the colon, the large intestine, where water is reabsorbed and the remaining material is formed into stool before being expelled through the rectum. The esophagus simply transports swallowed food to the stomach; the stomach starts digestion with acid and enzymes; the small intestine is where most digestion and nutrient absorption occur. Once the nutrients are extracted, what remains passes into the colon to be eliminated.