Flux

Flux is a medical term that refers to a continuous and often rapid flow or movement of a substance, usually a liquid or gas, from one point to another. It may be used to describe the movement of a fluid within the body, such as blood flow, or the flow of a substance through a system, such as a drug entering the bloodstream. Flux may also refer to the increase or decrease of a physiological or chemical process in the body, such as a change in the body's acidity levels.