Anatomy & Physiology › Section S · The lymphatic and immune system › Topic S.5
Immune disorders, transplantation, and cancer
An immune system that is too weak lets infections win, one that is too strong attacks harmless things, and one that loses tolerance attacks the body itself. This topic explains those failures, why transplanted organs are rejected, and how the immune system watches for cancer.
In this topic
- When defences misfire
- Inherited immunodeficiencies
- HIV and AIDS
- Type I: immediate hypersensitivity
- Types II, III and IV
- Worked example: classifying four reactions
- Autoimmune disease
- Transplantation and rejection
- Worked example: will a sibling match?
- The immune response to cancer
- Common mistakes to avoid
- Key takeaways
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