The immune system - GCSE Biology (Revision for 2020)
This video will cover human defence systems including the non-specific system and the immune system. Download the accompanying workbook from www.emmatheteachie.co.uk to use the diagrams & questions as you watch!
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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