For electricity to flow through the body and cause damage, what must exist?

For electricity to flow through the body and cause damage, a complete circuit must exist between the electrical source and the ground. This is essential because electric current requires a pathway to move.

When a person comes into contact with an electrical source, for current to flow through their body and into the ground, there needs to be a return path, commonly referred to as the circuit. If the circuit is incomplete, the flow of electricity will be disrupted, preventing an electrical shock or injury.

This principle is foundational in understanding electrical safety and the mechanisms of electrical injuries. The flow of current through the body can lead to various injuries, including burns, cardiac arrhythmias, and even death. Therefore, establishing a complete path is critical in assessing the danger posed by electrical sources.