Exchange in the gut B3 1.7

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Note by livvihunt123, updated more than 1 year ago
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Created by livvihunt123 over 6 years ago
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Note on Exchange in the gut B3 1.7, created by livvihunt123 on 03/18/2015.

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The food we eat is digested into small soluble molecules. In the small intestine these solutes arr absorbed into the blood. The villi line the inner surface of the small intestine and are the exchange surface for food molecules.

The villi are finger like projections which greatly increase the surface area for absorption to take place.

The walls of the villi are very thin and there are tiny capillaries close to the wall.

The soluble products of digestion can be absorbed into the villi by either diffusion or active transport.

GUT EXCHANGE

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