The six hollow organs are yang and they are paired with the solid organs to the following: liver and gall bladder, heart and small intestine, spleen and stomach, lungs and large intestine and kidneys and urinary bladder. The triple heat(er) is a series of functions and itself is not an organ. (The three burning spaces, or three tan tians) see five phases or elements chart.
Small Intestine (Shao Chang)
The functions of the small intestine are to refine the food coming into the stomach, to absorb the essence of the food, and to transfer food molecules to be used as energy for the functions of the body. The dysfunction of the small intestine may cause a shortage of energy for the body that will result in the weakening of all normal functions. Internal disorder and disease can follow.
Gall Bladder (Tan)
The gall bladder stores the clear liquid bile. The other five hollow organs store liquid that is not clear. The gall bladder is always full like the five solid organs; therefore it is classified as a hollow organ and also an extra organ.
The functions of the gall bladder are to protect the nervous system from over reaction from outside external stimulation, to help normalize a person emotionally, and help the person to make decisions. If the gall bladder is weak, it will be unable to effectively adjust the nervous system and ones energy and blood circulation will be in disorder. One can then easily become sick.
The main function of the stomach is to intake food, cook, mash and digest food. The dysfunction of the stomach may cause vomiting and gastralgia. The inability to intake enough food to provide adequate energy for the body can result in weakness which in turn will cause problems for all the organs and the entire body.
Large Intestine (Ta Chang)
The main function of the large intestine is to eliminate body wastes. The dysfunction of the large intestine can result in the body's inability to differentiate water and waste, causing diarrhea or too much heat acting on the waste, causing constipation and other problems.
Urinary Bladder (Pang Guang)
The main functions of the bladder are to eliminate the urine and to help balance the amount of liquid in the body. The dysfunction of the bladder will first affect the function of the kidneys.
Triple Heater(s) (San Jiao)
The functions of the triple heaters are to administer the circulation of the chi and help fluid metabolism of the body. The upper heat is like a fog, the middle is like waves, and the lower is like running water. As far back as the 3rd century the triple heat was regarded an organ “that has a name but no form”
The triple heat is a puzzle even to the Chinese, but as we will see later, the triple heat meaning is different as a meridian. The channel or meridian is associated with the triple heat (or burner) and is connected with the pericardium. (To the ancient Taoist's, however, this channel was not a mystery). Symptoms of dysfunction of the triple heat are abdominal distension, hardness and fullness in the lower abdomen and enuresis, as well as frequent urination and edema.