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Cambridge IGCSE Biology practice

Paper 4 structured question: Absorption

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Absorption

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Paper 4Theory (Extended)2 marks

Villi in the small intestine help absorb nutrients from digested food.

Description

Structure of a villus

A villus is a small finger-like projection with a thin outer layer of epithelial cells. Inside, it contains blood capillaries, a lacteal, and muscle fibers that help it move.

  1. a

    Identify two types of vessels found inside a villus.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 4 structured question: Absorption

Paper 4Theory (Extended)3 marks

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.

  1. a

    Describe the structure of a villus.

    Aim for approximately 3 distinct marking points.

    [3]