IB Biology Sub-topic C3.2 Notes
This page contains our IB Biology notes for sub-topic C3.2. By reading each one of these notes, you will fully cover the content for IB Biology 'Defence against infectious disease'.
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The Immune system
Whilst you will learn about normal body function and how it fails during conditions, it is also important to understand how the body handles infectious disease. Organisms or viruses that cause infectious disease are called pathogens. The is the job of the immune system is to prevent pathogens from causing a disease, which is divided into:
- Primary defense system – structures that aim to prevent pathogen entry.
- Secondary defense system – structures that aim to destroy pathogens that have bypassed the primary defense system.
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