The immune system - GCSE Biology (Revision for 2020)

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***This video is for the topic of Infection and Response for GCSE Biology and Combined Science (9-1) - it is written for the AQA specification but overlaps with other exam boards.***

Our bodies have two lines of defence against pathogens. The first is non-specific. It includes:

- The nose
- The skin
- The trachea and bronchi
- The stomach

I’ll explain how each one of these works.

If a pathogen makes it past these, then the immune system will try to destroy it. There are three ways it can do this:

- Phagocytosis
- Antibody production
- Antitoxin production

We’ll cover how the white blood cells use these methods to destroy pathogens.

The video finishes up with some quick questions to test your understanding! This is a great way to improve and boost your grades, so give them a go by pausing the video & thinking through your answers or writing them in your Studyalong Workbook.

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Emma the teachie