Pathogens
Pathogens must be able to:
- gain entry to host cells
- colonise the tissue of the host
- resist the defence of the host
- cause damage to host tissue.
Microorganisms gain entry of the host through: The gas exchange system or digestive system.
The body has natural defence mechanisms such as:
- Mucus layer on exchange surface
- Enzymes that break down pathogens
- Production of stomach acid
- Created by: charlotte
- Created on: 11-03-13 10:51
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