MICROANATOMY

Detailed explanation-1: -It was not until the year 1900, when Karl Landsteiner at the University of Vienna, discovered why some blood transfusions were successful while others could be deadly. Landsteiner discovered the ABO blood group system by mixing the red cells and serum of each of his staff.

Detailed explanation-2: -1900: The breakthrough came when Karl Landsteiner, an Austrian scientist, discovered three human blood groups. These were the A, B and O blood groups. For this discovery he was awarded the Nobel Prize for medicine in 1930.

Detailed explanation-3: -Karl Landsteiner discovered why: when different people’s blood was mixed, the red blood cells sometimes clumped. He explained in 1901 that people have different types of red blood cells, that is, there are different blood groups. The discovery led to safe blood transfusions between people with compatible blood groups.

Detailed explanation-4: -The ABO blood types were discovered by Karl Landsteiner in 1901; he received the Nobel Prize in Physiology or Medicine in 1930 for this discovery. ABO blood types are also present in other primates such as apes and Old World monkeys.

Detailed explanation-5: -Initially, Landsteiner recognized three different blood types: A, B, and C. The C-blood type was later more commonly called type-O. In 1902, one of Landsteiner’s students found a fourth blood type, AB, which triggered a reaction if introduced into either A or B blood.