Like the five zang-organs

the naming of the six fu-organs depends on the image thinking. The vocal side of stomach（胃）

intestine（large and small）（大肠、小肠）

gallbladder（膽）

bladder（膀胱） and Jiao（three jiao）（三焦） not only indicates pronunciation

but also is the main source of meaning. The ancients acquired the structure and function cognition of the six fu-organs according to anatomy and experience observation

and determined the name of the six fu-organs by analogy of image thinking. Thus

we can deepen the understanding of the relationship between image thinking and the construction of traditional Chinese medicine theory.