blood
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| 1901, when the Austrian Karl Landsteiner discovered human blood groups. | (blank)
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| Mixing blood from two individuals can lead to blood clumping or agglutination. | (blank)
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| The clumped red cells can crack and cause toxic reactions. This can have fatal consequences. | (blank)
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| blood clumping was an immunological reaction which occurs when the receiver of a blood transfusion has antibodies against the donor blood cells. | (blank)
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| Karl Landsteiner's work made it possible to determine blood types and thus paved the way for blood transfusions to be carried out safely. | (blank)
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| adult human has about 4–6 liters of blood circulating in the body. Among other things, blood transports oxygen to various parts of the body. | (blank)
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| Blood consists of several types of cells floating around in a fluid called plasma. | (blank)
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| The red blood cells contain hemoglobin, a protein that binds oxygen. Red blood cells transport oxygen to, and remove carbon dioxide from, the body tissues. | (blank)
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| The white blood cells fight infection. | (blank)
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| The platelets help the blood to clot, if you get a wound for example. | (blank)
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| The plasma contains salts and various kinds of proteins. | (blank)
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| There are more than 20 genetically determined blood group systems known today, but the AB0 and Rh systems are the most important ones used for blood transfusions. | (blank)
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| Not all blood groups are compatible with each other. Mixing incompatible blood groups leads to blood clumping or agglutination, which is dangerous for individuals. | (blank)
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| Karl Landsteiner was involved in the discovery of both the AB0 and Rh blood groups. | (blank)
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