Our skin is our first line of defense as we move through the world, providing both a physical barrier and an immune barrier against microbes and other dangers that could make us sick. Learn how the skin barrier works in this episode of BrainStuff.
BrainStuff
2,619 clip(s)
How Do Search-And-Rescue Dogs Work?
BrainStuff Classics: Why Do We Drop a Ball on New Year's Eve?
Can You Really Die of Boredom?