Blood group is important especially pregnancy. It is also important to know the blood group for transfusion of blood or transplant of organ.
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Blood type is determined by antibodies and antigens present in red blood cells antibodies A and B for blood group A and B, when there's no antibodies it is group AB, when both antibodies A and B is present then it is group O
It depends what blood group or system you are interested in. The major blood groups are the ABO and Rh system. In addition to these, there are approximately 30 other blood groups/systems of importance in immunohematology.
Blood group A can donate and receive blood from blood group A. Blood group B can donate and receive blood from blood group B. Blood group AB can donate only to blood group AB and receive from any other blood group (they are universal recipent) Blood group O can donate to any other blood group ( they are universal donor) and can receive from only blood group O.
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The importance of blood groups is highly important. All humans haven't got the same blood group. The reason? we do not know. Blood groups range from a - b - ab- o- a b ab o a + b+ AB+ o+. if two persons had different blood types then you are risking getting diseases such as; aids and hiv. These diseases are fatal.
which blood group can be donate to all other groups? "O" positive blood group. it's called universal donor.
If you are in the AB blood group, you can only donate blood to others in the AB group. You can receive blood from any group.
A or AB
A or O
o-
blood oxygen meters