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Introduction

Picture 1. Human immune response. T cells clump around pathogens (blue).

The human body is a rich source of fats, proteins, carbohydrates and other nutrients for the growth of micro-organisms. It is therefore no surprise that many have evolved to grow and reproduce on the surface or inside the body. These 'pathogens' cause damage and disease as they grow and reproduce so the body has developed an immune system to combat these infections.

Contents
	There are 11 pages in this electronic resource (e-source): Introduction Pathogens and disease Barriers to infection Acquired immunity Immunisation Medicines and the immune system Vaccinations in the UK Antibiotics Immune system causes problems HIV/AIDS Quiz

Using this e-source

There are a number of interactive features in this e-source:

A glossary of terms: any word with a glossary entry is highlighted like that. Clicking on the word will open a new window with a definition of that word.

Quick questions: at the end of e-source, there is a set of quick questions to test your understanding of the scientific ideas.

Animations: most of the animations can be expanded to full screen size, ideal for showing on an interactive whiteboard. The animations will play all the way through or can be viewed one section at a time.

Downloads: Teachers can download individual diagrams, animations and other content from the Resource Library area of the website. Terms and Conditions apply.

Last updated March 2004.