B3 1.7: Exchange in the Gut.

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  • Created by: JSpencer
  • Created on: 03-03-16 19:12
What happens to the food we eat in the gut?
It is digested into small soluble molecules.
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What happens to them in the small intestine?
Solutes are absorbed back into the gut.
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Where are the villi?
The line the inner surface of the small intestine.
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What do the villi do?
They are the exchange surface for food molecules.
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Why do the villi help?
The greatly increase the surface area for absorbation to take place.
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What are the walls of the villi like?
Very thin and there are many cappilaries close to the wall.
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What happens to the soluble products of digestion?
The can be absorbed into villi by either diffusion or active transport.
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Other cards in this set

Card 2

Front

What happens to them in the small intestine?

Back

Solutes are absorbed back into the gut.

Card 3

Front

Where are the villi?

Back

Preview of the front of card 3

Card 4

Front

What do the villi do?

Back

Preview of the front of card 4

Card 5

Front

Why do the villi help?

Back

Preview of the front of card 5
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