The Vegetative Nervous System is formed by a nervous network that interconnects the whole organism, from the closest to the farthest places, as well as it connects with the Central Nervous System. Ninety percent of the vegetative nervous system is at the cutaneous level and the rest is located in deep ganglia.

A simple explanation:
Imagine that the vegetative nervous system is a large highway with many lanes going in different directions. The deep ganglia would be the tolls, i.e., the centers that organize the direction that cars have to take to get to their place. If the lanes are clear, cars circulate normally, but if there is an obstacle on the road and, for example, several lanes are cut, traffic jams occur. Cars are then held up, and some opt for an alternative route to get to their location.

This example makes us understand that when there is an alteration in any part of the body, due to the integrating functional unit, alterations can be provoked in other places even if they are far away, an alteration that is not always immediate, but can sometimes appear some time later.