Zang-Fu Organ Theory is the study of the Five Zang and Six Fu organs (viscera). The theory focuses on the observation of the exterior manifestation of the internal organ processes, however, this is not the sole focus.
Close attention is paid to the anatomy, physiology and pathology of the organs along with their interrelationships. Zang-Fu Organ Theory also studies the essence, qi, blood, body fluids and spirit associated with each organ. Additionally, it incorprates other theories of TCM, namely the theories of Yin-Yang, Five Elements and Qi.
The five zang-organs include heart, liver, spleen, lung, and kidney. The six-fu organs include gallbladder, stomach, small intestine, large intestine, urinary bladder and triple burner.
This is an important part of the TCM theoretical system. It is important for the diagnosis, prevention and treatment of disease.