In no2DO trigram Dui, the lake, is associated with the functional circuit lung (LU). The lungs is said to be the receiver of heavenly qi and that it distributes its inspiring impulses throughout the body. The lung is also the place of exchange with our environment: We absorb life energy and release our energy in rhythmical exhale back to our environment.
Read more: Citations regarding the Functional Circuit Lung
Read more: Trigrams, Elements, Functional Circuits