Plasma is the aqueous portion of the blood, the acellular portion in which the cellular portions are suspended and transported. It also contains electrolytes and substrates from digestion, such as glucose, fatty acids, and proteins. Hormones also are transported in this part of the blood.
In electrical engineering, ground or earth is the reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth.trictly speaking, the terms grounding or earthing are meant to refer to an electrical connection to ground/earth. Bonding is the practice of intentionally electrically connecting metallic items not designed to carry electricity.
In an aircraft application, one bonds the airplane to the fuel source with an earthing or grounding wire. Often the fuel truck is also grounded, meaning a bond between the truck and the ramp (apron) surface. Bonding and grounding does not take place through aircraft or fuel truck tires, which act as insulators.