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.
The Law of the Electric Land. There are 3 things people typically consider when thinking about how dangerous electricity is: Voltage (measured in volts) tells you how much force will be used to push through your body. Resistance (measured in ohms) tells you how strongly your body will resist those electrons being pushed through it. Current (measured in amps) tells you how many electrons will flow through you each second.