VBB System
Physiology

The Five-Viscera store up essence qi and keep it not to be discharged. Therefore they could be fulled(invisible) , but not consolidatedly filled.
Yellow Emperor’s Canon of Medicine-Plain Conversation
Chapter 11:Different Discussion of Five-Viscera

The six-bowels(Fu organ)transport and tranform food without storing up it. Therefore, they could be filled(visible material) but not full.
Yellow Emperor’s Canon of Medicine-Plain Conversation
Chapter 11:Different Discussion of Five-Viscera

If Yin is normal and Yang is astringent, the essence and spirit will be stable. If Yin and Yang are seperated and broken up, the essence and spirit will be exhausted.
Yellow Emperor’s Canon of Medicine-Plain Conversation
Chapter 3:Discussion of Interrelationship Between Life and Nature
Pathology

If essence qi is taken away, the vicera will be deficient.
Yellow Emperor’s Canon of Medicine-Plain Conversation
Chapter 28:General Discussion of Xu(deficiency) and Shi(Excess).

If the pathogen is exuberant, the vicera and bowels will be excess.
Yellow Emperor’s Canon of Medicine-Plain Conversation
Chapter 28:General Discussion of Xu(deficiency) and Shi(Excess).

If Yin is normal and Yang is astringent, the essence and spirit will be stable. If Yin and Yang are seperated and broken up, the essence and spirit will be exhausted.
Yellow Emperor’s Canon of Medicine-Plain Conversation
Chapter 3:Discussion of Interrelationship Between Life and Nature

If Yin is normal and Yang is astringent, the essence and spirit will be stable. If Yin and Yang are seperated and broken up, the essence and spirit will be exhausted.
Yellow Emperor’s Canon of Medicine-Plain Conversation
Chapter 3:Discussion of Interrelationship Between Life and Nature