Phagocytosis - barriers to entry
- Created by: Narey7Emily97
- Created on: 17-12-13 19:53
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- Barriers to entry
- A protective covering
- the skin covers the body surface which pathogens find hard to penetrate
- epithelia covered in mucus
- Many epithelial layers produce mucus, which acts as a further defence against invasion.
- Hydrochloric acid in the stomach
- This provides a low pH that the enzymes of most pathogens are denatured and therefore the organisms are killed
- A protective covering
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