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Cambridge IGCSE Biology practice

Paper 3 structured question: Blood vessels

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Blood vessels

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Paper 3Theory (Core)1 marks

Capillaries are tiny blood vessels in the circulatory system.

Description

Capillaries

Capillaries connect arteries to veins and have very thin walls that allow substances to pass between blood and body cells.

  1. a

    State one role of capillaries in the circulatory system.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Blood vessels

Paper 3Theory (Core)2 marks

Diagram Description

Capillary Function

A diagram shows blood flowing from an artery into capillaries and then into a vein. Oxygen and nutrients move from the blood through the capillary walls into body cells. Carbon dioxide and waste products move from body cells into the blood through the capillaries.

  1. a

    State two roles of capillaries in the circulatory system.

    Aim for approximately 2 distinct marking points.

    [2]