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Paper 4Theory (Extended)3 marks
The small intestine is lined with many villi, which help in the absorption of nutrients.
Diagram Description
Diagram of a villus
A diagram shows a finger-like projection labeled as a villus. The outer layer is thin and covered with epithelial cells. Inside the villus are blood capillaries, a lacteal (lymph vessel), and muscle fibers.
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Describe the structure of a villus.
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