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Experiments with blood transfusions, the transfer of blood or blood components into a person's blood stream, have been carried out for hundreds of years. Many patients have died and it was not until 1901, when the Austrian Karl Landsteiner discovered human blood groups, that blood transfusions became safer. Mixing blood from two individuals can lead to blood clumping or agglutination. The clumped red cells can crack and cause toxic reactions. This can have fatal consequences. Karl Landsteiner discovered that blood clumping was an immunological reaction which occurs when the receiver of a blood transfusion has antibodies against the donor blood cells.
Karl Landsteiner's work made it possible to determine blood groups and thus paved the way for blood transfusions to be carried out safely. For this discovery he was awarded the Nobel Prize in Physiology or Medicine in 1930.
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Do giraffes have blood groups?
yes they do. they have at least 2 different blood groups.
Does blood type get factored into who is assigned to different groups in the military?
no
Why do mosquitoes not die after sucking blood of different blood groups as it may clot?
There is a compound that is in the mosquito's saliva that prevents blood from clotting
What is the different rhesus groups?
if you are talking about blood then I think it's positive and negative.
Why do mosquitoes not die even they suck different blood grup?
Mosquitoes do not die after sucking the blood of different blood groups because they are digested in their systems first before they suck another person's blood.
Can a positive blood type be given to a negative blood type?
no it can not because just like water and a brick is different by solid and liquid that way positive and negative blood groups are different
How many different types of blood are there?
Under the most common system of blood typing there are thirty different blood types. From this grouping typically there are eight groups considered: O, A, B, and AB positive and negative.
Are B and Rh one blood type or two different blood types?
The blood groups A, B, AB and O are the seperate blood types and within a blood type the blood may be Rh+ or Rh-.
Are blood groups effect fitness?
No. Blood groups are inherited from your parents.
Are there only four different types of blood?
Yes, there are only four official types of blood from which there are 30 substances and over 600 different blood-group antigens have been found across the varies ethnic groups.
What does it mean if someone is A positive?
It means that their blood type is A+ (A Positive). Human blood is divided into several different groups based on unique antigen substances, found on red blood cells.
How many groups of blood groups are there?
There are four main blood groups: A, B, AB, and O. These also have a negative and a positive, I.e A+, A-, and so on. This would mean that there are eight different types of blood group: A+ A- B+ B- AB+ AB- O+ O-
