The War Inside Your Body: Watch White Blood Cells Attack a Parasitic Worm
Updated 12.26.15, 2:02 PM EST by Jolene Creighton
There are trillions of microbes living inside our bodies. In fact, some estimates suggest that there are over 100 trillion microbes in the average human. Fortunately, we have a built-in defense system to protect us from harmful intruders. Watch your white blood cells going to war for you.
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