Immune System, Part 1: Crash Course Anatomy & Physiology #45

Transcript

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, hey, we all gotta make a living. But it is not y... Read More