Final answer:
Blood type O is the only type that lacks both A and B agglutinogens, making it compatible with any recipient and known as the universal donor.
Step-by-step explanation:
The blood type that does not contain A or B agglutinogens is type O. People with type O blood lack both antigen A and antigen B on their erythrocytes, however, they have both anti-A and anti-B antibodies circulating in their blood plasma. This absence of antigens means that type O blood does not elicit an immune response when transfused into a person with any other blood type, which is why individuals with type O blood are often called universal donors.