The theory of homology of liver and kidney originated from Neijing. "Homologous liver and kidney" means that although the structure and function of liver and kidney are different, they are of the same origin and have close physiological and pathological relationship, so the treatment principle of "simultaneous treatment of liver and kidney" can be adopted.
"Homologous liver and kidney" means that the structure and functional system of liver and kidney are closely related through some central links. "Liver and kidney originate from essence and blood" means that the structure and functional system of liver and kidney are closely related through essence and blood.
Although the previous research on the essence of Tibetan elephants (including liver and kidney) only focused on the function and material basis of a single organ (liver or kidney), there is still a lack of systematic and in-depth research on the related mechanism of "liver and kidney homology"; However, some studies objectively provide a preliminary experimental basis for "liver and kidney homology"