Our bodies are made up from 70% of liquids and 85% of these are made up of plasma. We have between 4,5l and 5,5l of blood in our bodies. We have the same basic parts in our blood but there are is lot of variety in kinds of blood.
Our parents’ genes determine the type we have. Our blood is made up of plasma in which there are different kinds of cells: red blood cells, white blood cells, platelets, proteins and salts. The combination protein molecules (antigens and antibodies) make our blood different from someone else and this combination is the basis of our blood type.
There are four major group, based on whether or not we have two specific antigens (A and B), and they are: A, B, AB, 0. There is a third kind of antigen called Rh factor .
Our blood type can be positive (Rh+) if we've this antigen or negative (Rh-) if we don't have this.
So, there are 8 blood types:
A positive (A+)
A negative (A-)
B positive (B+)
B negative (B-)
AB positive (AB+)
AB negative (AB-)
0 positive (0+)
0 negative (0-)
For a blood transfusion it's important that donor and recipient have the same blood type or a compatible blood type.
0- universal donor and AB- universal recipient.
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