Cardiovascular systemOnline version Distinguish between the four ABO blood groups. by Kristani Cochran 1 Type A 2 Type B 3 Type AB 4 Type O Displays type A agglutinogens Produces anti B antibodies Displays only type B agglutinogens Produces anti A antibodies displays both type A and B agglutinogens produces no antibodies Displays no agglutinogens Produces anti A and B antibodies