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Exam-style practice

Circulatory systems answer explanations

Review worked answers and explanations for Circulatory systems. Aligned to Cambridge IGCSE Biology.

Answer explanations

Question 1 of 8

Review the answer support, then move sideways through the set.

Paper 3 structured question: Circulatory systems

Paper 3Theory (Core)2 marks

Diagram Description

Simplified diagram of the circulatory system

The diagram shows the heart connected to arteries and veins. Valves are present in some veins.

  1. a

    Describe the role of valves in the circulatory system.

    [2]