The so-called internal organs refer to various organs in the human body. It is also used to describe the internal situation of things.
"Viscera" refers to solid organs, including heart, liver, spleen, lung and kidney, and "fu-organs" refers to hollow containers of five fu-organs corresponding to five internal organs, such as small intestine, gallbladder, stomach, large intestine and bladder. In addition, the thoracic cavity and abdominal cavity of the human body are divided into upper jiao, middle jiao and lower jiao, which are collectively called triple jiao and are the sixth fu-organs.
Jin Mu fire, water and soil correspond to heart, liver, spleen, lung and kidney. The focus is on conditioning according to the changes of the four seasons. Prevention first.
That's how I understand it. I hope I can help you!