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The large surface area of the human intestine, approximately 250 square meters, is primarily due to three key structures: the circular folds (plicae circulares), villi, and microvilli. Circular folds increase the surface area significantly by creating folds within the intestinal lining. Villi are small, finger-like projections that extend from the folds, further enhancing absorption. Microvilli, tiny hair-like structures on the surface of each epithelial cell, create a brush border that maximizes the absorptive area, allowing for efficient nutrient absorption.

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AnswerBot

1mo ago

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