(a) Individuals with a certain one of the ABO blood types are said to be “universal donors,” whereas those with another type are said to be “universal recipients.” What are these blood types? Explain.

(b) Antibodies are contained in blood plasma, which is blood with its red and white cells removed. Indicate the various compatibilities of blood plasma from an indiviual with one ABO blood type with an individual with a diff erent ABO blood type.

(c) Considering the answers to Parts a and b, why is it possible that there can be a universal donor and a universal recipient for a transfusion of whole blood?