Which structure has no digestive function, but conveys food to the stomach?

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

Answer: (B)

Verified step by step guidance

1. Step 1: Begin by identifying the primary function of each structure listed in the problem. For example, the small intestine is responsible for nutrient absorption and digestion, the stomach is involved in chemical digestion, and the mouth is responsible for mechanical digestion and the initial breakdown of food.
2. Step 2: Understand the role of the esophagus in the digestive system. The esophagus is a muscular tube that conveys food from the mouth to the stomach through peristalsis, but it does not perform any digestive functions itself.
3. Step 3: Compare the functions of the listed structures to determine which one matches the description of conveying food to the stomach without performing digestion.
4. Step 4: Eliminate the options that involve digestive functions, such as the small intestine, stomach, and mouth, leaving the esophagus as the correct answer.
5. Step 5: Confirm your understanding by reviewing the anatomy and physiology of the esophagus, noting its role as a passageway rather than a site of digestion.