| | Conditions Treatments | Blood Disorders Can the liquid part of blood be called serum? The answer is: no The liquid part of blood is called plasma. Serum is plasma without the fibrinogen clotting protein. Blood Disorders - Related Articles NCQA Physician Office Requirements Are life insurance proceeds taxable for the care of an individual in a nursing home? Can a bad childhood cause dementia? How to Use Rhubarb for Health Plastic-Surgery Cost for Lip Reduction Diets for Coeliacs Things to Eat to Stop Being Diabetic While Pregnant