This action also proposes to update our. fuel regulations by defining fuel blends. containing 16 to 83 volume percent. ethanol as ethanol flex fuel (EFF) and to. no longer treat fuel blends containing 16. to 50 volume percent ethanol as. gasoline. The EPA is proposing.
Medical Definition of Process. Process: In anatomy, a projection from a structure. For example, the process of the mandible is the part of the lower jaw that projects forward. Last Editorial Review: 3/19/2012.
Ventilation is the process by which air moves in and out of the lungs. Diffusion is the spontaneous movement of gases, without the use of any energy or effort by the body, between the gas in the alveoli and the blood in the capillaries in the lungs. Perfusion is the process by which the cardiovascular system pumps blood throughout the lungs.