According to the material, where does digestion end?

• A. In the small intestine
• B. In the large intestine
• C. In the stomach
• D. In the mouth

Answer: (B)

Digestion ends in the small intestine. After food leaves the stomach, chyme enters the small intestine where enzymes from the pancreas and bile work to break down carbohydrates, proteins, and fats. The lining of the small intestine provides brush-border enzymes that finish many of these reactions, and the large surface area from villi and microvilli allows most nutrients to be absorbed into the bloodstream or lymph. The large intestine mainly absorbs water and electrolytes and hosts some microbial activity, but it does not complete the digestion of most nutrients. So, the end point of digestion is the small intestine, not the large intestine, mouth, or stomach.