I believe A blood type can give to A and AB. It can receive from A and O B blood type can give to B and AB. It can receive from B and O AB can only give to AB but receive from all O can give to all but receive from only O.
Let me make a quick little chart, and then I'll explain. A B \ / AB | O Okay, now for the real answer. So, if you're O, you can give to everyone and recieve from everyone. If you're AB, you can give...
Type A blood can only go to someone that also has type A. There is a protein in type A blood that would cause blood of other types to clump togather if it is mixed with them. Type B can only give to...