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, about 55% of the blood volume, consists of water, ions, various plasma proteins, nutrients, waste products, respiratory gases, and hormones, while the cellular elements include red and white blood cells and platelets. 2  Blood plasma is about 90% water.