Contents
Key Stage 3
Meaning
The Immune System is a set of internal defences the body can use to fight infection.
About the Immune System
- The Immune System consists mostly of different types of white blood cells.
Key Stage 4
Meaning
The Immune System is a set of internal defences the body can use to fight infectious pathogens.
About the Immune System
- The main part of the immune system is the white blood cells.