Microorganisms and Humans: Commensal and Pathogenic Flora 

Did you know that there are more microbes inside of you than there are cells that belong to your own body? There are tons of those critters all over the place! But don't freak out, most of them are actually helping you. They protect you and help with digestion and do other things. But some of them are pathogenic. This means they can cause disease. Let's learn more about what they are doing in there, how they help, and how they can harm!
Script by Kellie Vinal
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