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.
The components of the blood. Plasma is a yellow liquid which transports all of the blood cells around your body. It carries waste carbon dioxide from the cells of the body to the lungs to be removed. It takes urea from the liver where it is made to the kidneys to be excreted in the urine.