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The first line of defense is the skin, Keeping out PATHOGENS.
Our bodies are surrounded by microorganisms trying to get into us. Microorganisms cause serious problems if they survive and reproduce inside us.
When you get a cut or scrap pathogens get into the body and gets infected and the area turns yellow with pus it also becomes warm and reddened.
Some diseases caused by pathogenic microorganisms sometimes can be passed in a variety of ways from one person to another
A disease may develop when one or more of the bodies organs malfunction. Such as liver , heart,stomach, or kidney does not function the right way.
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