A recent study delves into the science, but doctors say there’s more to it.

Running extreme distances may strain more than just muscles and joints. New research suggests ultramarathons can alter red blood cells in ways that make them less flexible and more prone to breakdown, ...

Our blood consists of many cell types that develop through different stages from a precursor type -- the blood stem cell. An international research team has now investigated the developmental pathways ...

Immature ganulocytes, also called myeloblasts, are a type of young white blood cell. Unusual amounts of myeloblasts usually occur due to problems with bone marrow, such as certain types of blood ...

Red blood cells transport oxygen throughout your body, including to vital organs and tissues. They also help your body get rid of carbon dioxide. Too little or too many red blood cells may be ...

Knowing your blood type is crucial medical information, but unless you've given blood before you might not be sure what yours is. I realized this when I was asked for mine while filling out paperwork ...

There are many ways that the human body responds to stress, from the adrenaline rush of the "fight-or-flight" instinct to more subtle, complex changes that may not be immediately recognizable to us.

A recent mouse study suggests that low-oxygen conditions, such as being at high altitudes, could cause red blood cells to absorb excess blood glucose, potentially helping to protect against diabetes.

Talk about a lonely hearts club. An unidentified woman from Guadeloupe has the rarest blood type on Earth, to the extent that she’s only compatible with herself. The 68-year-old is thus far the only ...