Acupuncture is based on the fact that every parts of human body are connected in the forms of energy vibration.
These connections or common fields that are shared commonly are called meridians..
Same meridians have the same energy vibration. For example, the hand-taiyin-lung meridian begins from the stomach and it passes the lung finally ends up in the thumbs.
These parts of body are vibrating in the same energy level. And that is why the stimulation of thumbs can treat the bad digestion in the stomach. Then how can we know the existence of the meridians? or energy vibrations? That is the dificulty of understanding human body. But
the keen observation of human body will reveals its secret. The different energy vibration is also the proof that we have different many bodies. In anatomy, you can not find the meridians. But meridians really exist in the forms its functions. In the material human body, you can not find the energy vibrations. When you tune yourself to deeper vibrations, you will feel the vibrating existences that are surrounding human body.