There are also explanations of different organs in traditional Chinese medicine, But they are not just substances we can see, not just anatomical organ substances. The organ in Traditional Chinese Medicine is an expression symbol of time and space.

Not just traditional Chinese medicine,  Most ancient medicine in other countries in the world is also like this.

In traditional Chinese medical theory, the condition for the establishment of various models is a corresponding relationship between the human body and the observed operation law of celestial bodies.

We cannot deny the accuracy of the forecast. And the forecast is also based on the correspondence with celestial bodies. But it may use different symbols. In ancient China, they used heavenly stems and earthly branches.