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What are three defence mechanisms that protect an animal from infectious disease agents?
Wiki User
∙ 11y ago
There are actually many, but I will list three common defenses.
1. Intact cutaneous membrane (skin) - if the pathogens cannot get into the body, they cannot cause disease.
2. Innate immune system - there are cellular defenses that scan the blood for common bacterial proteins; when a bacteria is found it is destroyed
3. Functional gastric barrier - the pH of the stomach is about 2, which is sufficiently acidic to destroy many bacteria and viruses
Wiki User
∙ 11y ago
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