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B5 revision - Coggle Diagram
B5 revision
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Viruses
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Viruses infect a specific cell and then use it to reproduce. it takes over the nucleus and make the cell replicate in a different way
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Disease Prevention
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Now we use anti biotics to kill bacteria. there is one problem. They are coming resistant to them meaning they don't work and can lead to people dying
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Bacteria is becoming resistant because people are using too much and stopping before they need to because they feel better.
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Body Defenses
The largest physical barrier presented to a pathogen is the skin. Cuts in the skin can allow easy entry of pathogens into the body
Another way of pathogens getting into the skin is by an insect inserting it. Pathogens also enter through the mouth and nose meaning they don't need to break the skin.
There are two types of barriers, physical and chemical.
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