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. on This method breaks blood types down into four categories:
- Type A
- Type B
- Type AB
- Type O
Your blood type (or blood group) depends on the types that are been passed down to you from your parents.