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, ...

Platelets are small types of blood cells that prevent excessive bleeding. It’s possible to develop low or high platelet counts related to a number of health conditions. Platelets are one of the main ...

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