By Luis & Travis.
Blood typing is a method to tell what specific type of blood you have. What type you have depends on whether or not there are certain proteins, called antigens, on your red blood cells. Blood is often grouped according to the ABO blood typing system. This method breaks blood types down into four types.
Jobs that involve blood typing.
Doctors, scientist, cardiologist, and pretty much any other types of doctors.
Blood typing pros and cons.
A pro is that it test your blood and makes sure that you're okay. A con is that if you want to see your blood type sometimes you might find out some thing that you don't want to know about.