Running extreme distances may strain more than just muscles and joints. New research suggests ultramarathons can alter red ...

Red blood cells carry oxygen from the lungs around the body. They then carry carbon dioxide from around the body back to the lungs. These cells are an important component of blood. However, a range of ...

Stem cells are precursors of a variety of different cells: They can turn into anything from blood to bone to muscle. Human blood stem cells, known as hematopoietic stem cells, are the forerunners of ...

Inside our bones, a busy and vital process is happening every single second. Deep in the bone marrow, the body is constantly making millions of new blood cells and immune cells that keep us alive and ...

Scientists have long known that people living at high altitudes, where oxygen levels are low, have lower rates of diabetes than people living closer to sea level. But the mechanism of this protection ...