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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Gas exchange in humans

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Gas exchange in humans

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Paper 3Theory (Core)1 marks

The respiratory system is essential for human survival, facilitating the exchange of gases necessary for cellular respiration.

Description

Components of the Respiratory System

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

  1. a

    Identify List three components of the respiratory system.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Gas exchange in humans

Paper 3Theory (Core)3 marks

Description

Function of the Respiratory System

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

  1. a

    Explain How do the alveoli facilitate gas exchange?

    Aim for approximately 3 distinct marking points.

    [3]