There are five organ networks: Metal, Water, Wood, Fire, and Earth. Each is associated with its own meridian and set of functions.
Wood network (木行): the liver meridian (肝経)
Like a military commander who formulates strategy and tactics, the liver exercises authority for collecting and directing the blood. Since blood is never stationary but constantly circulating, and since Ki courses inseparably through the blood and with the blood, the liver equitably distributes all resource, and assures the maintenance of smooth flow and delivery.