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.
They say this: - Electricity is a type of energy. - Electric current is a flow of energy. 1  In a simple electric circuit, the electricity flows slowly in a complete circle, while the energy moves differently. 2  The electrical energy flows rapidly across the circuit, going from the source to the load but not returning.wo things are flowing: electricity flows in a closed loop, while energy is flowing one-way from source to load. In an AC system, the charges of electricity move back and forth over a distance shorter than a ten-thousandth of a millimeter. In other words, they sit inside the wires and vibrate.