Blood – everyone's got it. In fact, an adult who weighs between 150 and 180 pounds has around 1.2 to 1.5 gallons of blood in their body. This makes up approximately 10% of an adult’s weight. Blood ...

Knowing your blood type is critical during emergency health situations. Knowing your blood type is crucial medical information, but unless you've given blood before you might not be sure what yours is ...

Most people don’t spare a thought for their blood type unless they’re in need of a transfusion — but could yours hold secrets to your health? There are four main blood types: A, B, AB and O.

It is possible for blood type to change, and in some cases, this can happen without a blood transfusion. When someone is born, their blood type is determined, so everyone should know what their blood ...