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www.redcrossblood.org/learn-about-blood/blood-types.html

In fact, there are eight different common blood types. ... There are four major blood groups determined by the presence or absence of two antigens – A and B  ...

kidshealth.org/en/teens/blood-types.html

It might seem like blood is blood — it all looks pretty much the same to the naked eye. ... The four main blood groups are:.

thebloodconnection.org/about-blood/blood-education/blood-types

Human blood is divided into one of four main blood types (A, B, AB, and O) and are based on the presence or absence of specific antigens on red blood cells.

www.infoplease.com/science-health/health/blood-types

Are type A, type AB, type B or type O? Did you know what the four blood types are ? Learn more from Infoplease! Each blood type is also grouped by its Rhesus ...

www.livescience.com/36559-common-blood-type-donation.html

Jul 13, 2012 ... The most common blood type among people in the U.S. is type O-positive.

www.popsci.com/science/article/2012-02/there-are-way-more-blood-types-you-think

Feb 24, 2012 ... Researchers at the University of Vermont have discovered two new proteins on red blood cells that confirm the testable existence of two new ...

www.dadamo.com/txt/index.pl?1001

I've found that your nutritional needs can be determined by your blood type. Take a look at the food lists in Eat Right 4 Your Type; they are a guide for choosing ...

www.biology.arizona.edu/human_bio/problem_sets/blood_types/genotypes.html

Oct 23, 1997 ... A blood test is used to determine whether the A and/or B characteristics are present in a blood sample. It is not possible to determine the exact ...

www.webmd.com/a-to-z-guides/blood-type-test

Blood type tests are done before a person receives a blood transfusion and to ... The ABO test shows that people have one of four blood types: A, B, AB, or O. If ...