name the three ways that the surface area of the small intestine is increased.
Question
name the three ways that the surface area of the small intestine is increased.
Solution
The surface area of the small intestine is increased in three ways:
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Villi: The inner wall of the small intestine is not flat but covered in tiny finger-like projections called villi. These increase the surface area for absorption.
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Microvilli: Each cell on the surface of a villus has even tinier finger-like projections called microvilli. These further increase the surface area for absorption.
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Circular Folds: The inner surface of the small intestine has circular folds, also known as plicae circulares. These folds slow down the passage of food, allowing more time for absorption, and also increase the surface area.
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