Of several electricity concepts, the idea of  voltage  or  electrical potential  is probably the hardest to understand. Most of us are familiar with magnetic fields. Small magnets are surrounded with an invisible field which pulls upon iron, and which can attract or repel other magnets.
Plasma is a pale yellow sticky liquid. It makes up 55% of the blood s volume. The components of plasma are water 92%, dissolved protein 8%, glucose, amino acids, vitamins, minerals, urea, uric acid, CO2, hormones, antibodies.
1. Plasma is the part of the blood that contains both the serum and clotting factors.2. Serum is the part of the blood that remains once the clotting factors like fibrin have been removed. 3. Plasma contains the clotting factors and water, while serum contains proteins like albumin and globulin.