EMF (voltage) is the force that keeps current flowing in a circuit.
It keeps your digestive system flowing smoothly and keeps you 'regular'.
it keeps your blood flowing
Cancer
The heart is the organ that keeps the blood flowing. Valves in the heart ensure the flow is only in one direction.
A clot
Your heart keeps your blood "flowing"
permanently frozen soil
it keeps blood flowing
Valves
Valves
BEARS