Multiple Choice
Which of the following is NOT a component of the human digestive system?
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23. The Digestive System
Introduction to the Digestive System
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The villi are most developed in which part of the digestive system?
A
Esophagus
B
Stomach
C
Large intestine
D
Small intestine
Verified step by step guidance1
Understand the function of villi: Villi are small, finger-like projections that increase the surface area for absorption of nutrients in the digestive system. Their primary role is to maximize nutrient absorption.
Identify the location where nutrient absorption is most critical: The small intestine is the primary site for nutrient absorption in the digestive system, as it is where most digestion and absorption of food occurs.
Compare the structures of the digestive system: The esophagus is primarily involved in transporting food, the stomach is responsible for mechanical and chemical digestion, and the large intestine focuses on water absorption and waste formation. None of these structures are specialized for nutrient absorption like the small intestine.
Recognize the specialization of the small intestine: The small intestine has villi and microvilli, which are highly developed to increase the surface area for efficient absorption of nutrients into the bloodstream.
Conclude that the villi are most developed in the small intestine, as this is the region of the digestive system specialized for nutrient absorption.
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