For years, the pancreas has been being taught in biology class as an easy system: insulin lowers blood sugar, and glucagon ...

From the moment they're born, newborns—or, specifically, their immune systems—must learn to fight germs without harming their ...

Blood usually falls into a few widely recognized categories or types, based on the proteins that are expressed on the surface of red blood cells. For example, A or B antigens may be present there, ...

Human blood stem cells have been made in a laboratory for the first time, which could significantly improve how we treat certain types of cancer. The lab-grown cells have so far only been tested in ...