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Line 1: − *"Under the so-called ABO blood classification system in use for more than a century, Type O blood can be given to anyone, because it lacks such antigens. But Type A blood can only be given to people whose blood is Types A or AB, and Type B blood can only be used in those with blood Types B or AB." [http://www.washtimes.com/national/20070404-122704-3244r.htm]+ + + + + Line 5:
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There are four main '''Blood types'''; type A, type B, type AB and type O.
These relate to blood cell types and can be available in any combination in a person. Thus, a person's blood may contain both type A and B cell types. They would then be classified as type AB. Having neither of these cell types indicates type O.
Under the so-called ABO blood classification system in use for more than a century, Type O blood can be given to anyone, because it lacks such antigens. People with this blood type are known as ''"Universal Donors"'' and are much in demand by [[phlebotomist]]s. But Type A blood can only be given to people whose blood is Types A or AB, and Type B blood can only be used in those with blood Types B or AB. Type AB people are known as ''"Universal Recipients"'' as they can receive blood from any other blood type as well as their own.<ref>[http://www.washtimes.com/national/20070404-122704-3244r.htm Washington Times article]</ref>
==External links==
==External links==
* [http://www.washtimes.com/national/20070404-122704-3244r.htm Breakthrough makes all blood types universal] - Joyce Howard Price, ''[[The Washington Times]]'' - April 4, 2007
* [http://www.washtimes.com/national/20070404-122704-3244r.htm Breakthrough makes all blood types universal] - Joyce Howard Price, ''[[The Washington Times]]'' - April 4, 2007
[[Category:biology]]
[[Category:biology]]
==References==
<references />