Cambridge IGCSE Combined Science practice

Paper 3 structured question: Gas exchange in humans

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Paper

Marks

Topic

Gas exchange in humans

Exam-style question

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Paper 3Theory (Core)3 marks

Understanding the structure of the respiratory system helps in grasping how breathing occurs.

Description

The respiratory system is responsible for taking in oxygen and expelling carbon dioxide.

a
Explain How do the alveoli facilitate gas exchange?
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)1 marks

Description

The respiratory system includes the lungs, diaphragm, ribs, intercostal muscles, larynx, trachea, bronchi, bronchioles, alveoli, and capillaries.

a
Identify List three components of the respiratory system.
Your answer
Aim for approximately 1 distinct marking point.
[1]