Learning objective

Discuss how villi and microvilli enhance the internal surface area of the small intestine, aiding absorption.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

Cambridge IGCSE BiologyHuman nutritionSupplement content

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Understand this objective

Quick explanation

This point belongs to Absorption, especially Absorption outcomes.
You need to be able to discuss how villi and microvilli enhance the internal surface area of the small intestine, aiding absorption.
The key ideas to know are Explain.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

Explain

Why it matters

This objective helps connect Absorption outcomes to exam-style questions, flashcards, and revision notes for Absorption.

Revision tools

Flashcards10 linked cards

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Practice Questions7 linked questions

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Paper 4Theory (Extended)4 marks

Diagram Description

The diagram shows a villus with many microvilli on its surface, blood vessels inside, and a thin wall.

a
Explain how villi and microvilli increase the internal surface area of the small intestine and how this helps absorption.
Your answer
Aim for approximately 4 distinct marking points.
[4]

Revision notestopic notes

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