Just as our body has a circulatory system for the transportation of blood, it also has a Chi or Energy circulatory system. Chi moves throughout the body in channels or meridians. They are most popularly known as acupuncture meridians in the west.
Our bodies have thirty two main channels through which CHI flows. The two primary channels is the Governor channel (Du Mai) over the head and the functional channel through the front of the body. Most of the other thirty two channels begin in the fingertips or toes and flow into the body.
What we are talking about here is simply the flow of energy through the body.