Final answer:
Albumin does not serve an immune system function. Immunoglobulins, or antibodies, protect the body by binding to foreign objects such as bacteria and viruses.
Step-by-step explanation:
Albumin does not serve an immune system function. It is the most abundant protein in human blood plasma and is synthesized in the liver. Albumin transports hormones and fatty acids, buffers pH, and maintains osmotic pressures. On the other hand, immunoglobulins, or antibodies, are produced by specialized B lymphocytes and protect the body by binding to foreign objects such as bacteria and viruses.