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Paper 4Theory (Extended)4 marks
The small intestine is adapted to absorb nutrients efficiently.
Diagram Description
Diagram of a villus in the small intestine
The diagram shows a villus with many microvilli on its surface, blood vessels inside, and a thin wall.
- a[4]
Explain how villi and microvilli increase the internal surface area of the small intestine and how this helps absorption.
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