Several days ago, we were fortunate to get a tour of the gross anatomy lab here at Drexel University College of Medicine. And by gross, I don't mean disgusting - I mean what the medical world terms ...

Lymph nodes are small (about 1-2 centimeters around or the size of a couple of AAA batteries side by side) oval or kidney-shaped structures that are a part of your immune system. They're part of ...