User:Skittleys/Serum

In blood, the serum is the component that is neither a blood cell nor a clotting factor; it is the blood plasma with the fibrinogens removed. This includes all proteins not used in blood clotting, the electrolytes, antibodies, antigens, hormones, and any exogenous substances (e.g., drugs and microorganisms).

The study of serum is serology. Serum is used in numerous diagnostic tests, as well as in blood typing.