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Villi are 1-2mm long and are one cell thick so absorbed food products can easily pass through them.There are millions of them so the total surface area is said to be 300cm square in area.

The villi and microvilli on them largely increase the area in contact with molecules like amibo acids and monosaccharides.The circular folds also increase the surface area, so decrease the distance the absorbed foos must travel.

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11y ago

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