Tag «Immune System»

Immune System, Part 1: Crash Course A&P #45

Immune System, Part 1: Crash Course A&P #45

You may not know it, but your body is engaged in a never-ending battle. You are literally covered in staph and strep and e coli, and all sorts of dubious characters that are intent on using you, and your body’s many resources, to feed themselves, find shelter, and reproduce as much as they want. And, …