Although all blood is made of the same basic elements, not all blood is alike. In
fact, there are eight different common blood types. Learn how these blood groups
Blood Types. Human blood is grouped into four types: A, B, AB, and O. Each
letter refers to a kind of antigen, or protein, on the surface of red blood cells.
In 1930, he belatedly received the Nobel Prize for his discovery of blood types.
All humans and many other primates can be typed for the ABO blood group.
Jul 13, 2012 ... The most common blood type among people in the U.S. is type O-positive.
Blood might look the same and do the same job, but tiny cell markers mean one
person's body can reject another person's blood. Find out how blood types work ...
Sep 28, 2012 ... Information regarding blood types including charts outlining donor ... that can
trigger an immune response if they are foreign to the human body.
Blood type tests are done before a person gets a blood transfusion and to check
a pregnant woman's blood type. Human blood is typed by certain markers ...
www.ask.com/youtube?q=Human Blood Types&v=a_X9oTr3PlI
Mar 27, 2013 ... An introduction to human blood types. View more lessons: http://www.
Oct 22, 2012 ... The ABO blood group evolved at least 20 million years ago, but scientists still don
't understand the purpose of blood types.