<prompt> Serum contains all the clotting factors, exceptPlasma thromboplastinLabile factorHageman factorChristmas factor  <response>: If whole blood is allowed to clot and the clot is removed, the remaining fluid is called serum. Serum has essentially the same composition as plasma, except that:Fibrinogen factor I and clotting factors II, V, and VIII have been removed andHas higher serotonin content, because of the breakdown of platelets during clotting.Also, know that factor 5 is called as labile factor. 