Valves of the Heart. The heart functions by pumping blood both to the lungs and to the systems of the body. To prevent blood from flowing backwards or âregurgitatingâ back into the heart, a system of one-way valves are present in the heart.
An electric circuit is a path in which electrons from a voltage or current source flow. Electric current flows in a closed path called an electric circuit. The point where those electrons enter an electrical circuit is called the source of electrons.
Note that electricity doesn't flow, only current does, which is one aspect of electricity. And current is the flow of electrons. The current created at power plant travels â¦ for many miles over long wires called transmission lines.hen a stream of electrons moves from though the structure of a substance, the flow of the charge they carry is called electric current. Each atoms has negative and positive electric charges which, like magnetic poles, attract each other.