Multiple Choice
Which ruminant stomach is considered the 'true' stomach?
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23. The Digestive System
Introduction to the Digestive System
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Which region of the gastrointestinal (GI) tract contains villi?
A
Small intestine
B
Large intestine
C
Esophagus
D
Stomach
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. They are essential for efficient digestion and absorption.
Identify the regions of the gastrointestinal (GI) tract: The GI tract includes the esophagus, stomach, small intestine, and large intestine. Each region has distinct structural and functional characteristics.
Analyze the role of the small intestine: The small intestine is the primary site for nutrient absorption. Villi are present in this region to maximize absorption by increasing the surface area.
Compare the other regions: The esophagus is primarily involved in transporting food, the stomach focuses on mechanical and chemical digestion, and the large intestine is responsible for water absorption and waste formation. None of these regions contain villi.
Conclude that the small intestine is the region of the GI tract that contains villi, as its structure is specialized for nutrient absorption.
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