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.
Really confusing. Electrons flow from cathode to anode. In a circuit, the direction of current is opposite electron flow. This is because by convention (i heard it's ben franklins fault) current is the direction of positive charge.