How many blood types are there?
there are somany...how are they named? why are they named the way they are?
A, B , AB and O. But of course, there are both positive and negative for each blood type. By the way, if i have any mistake here, please correct me. :)
Well, there are lots of. There are lots of proteins in a blood. I know 3 groups of them only. (A, B, AB and 0), (Rh+ and Rh-), (M and N) but as I said, these are the only ones that I know, there are looooots of.