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Nutrients cross the intestine wall

Open to everyone until Friday, October 2

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Digested food is broken into tiny nutrients inside the small intestine. These nutrients pass through the intestine wall and enter the blood.

In the picture

  1. The small intestine wall: its inner surface has tiny folds that nutrients can pass through.
  2. A nutrient particle: it moves from the inside of the small intestine through the wall.
  3. A blood vessel: it collects the nutrient and carries it away in blood.

Examples

  • Sugar from a piece of bread entering the blood after digestion.
  • Amino acids from an egg entering the blood after digestion.

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Biology, Age 11