There are three main aspects in the formation of the theory of Tibetan images: one is from ancient anatomical knowledge. For example, "Lingshu Water Mirror" said: "A man of eight feet is here, and his meat can be measured and his death can be dissected. The firmness and brittleness of internal organs, the size of internal organs, the number of valleys, the length of pulse and the turbidity of blood ... all have a large number. " Second, long-term observation of human physiological and pathological phenomena. For example, if you catch a cold because of cold skin, you will have symptoms such as stuffy nose, runny nose and cough, so you realize that fur, nose and lungs are closely related. The third is the summary of long-term medical experience. For example, the theory of "kidney governing bone" came into being when it was realized that some drugs for tonifying kidney could accelerate fracture healing. The theory of Tibetan elephant is a unique physiological and pathological theoretical system. Among them, viscera is not only an anatomical concept, but more importantly, it summarizes the physiological and pathological concepts of a certain system of human body. Although the names of heart, lung, spleen, liver and kidney are the same as those of modern human anatomy, they are not exactly the same in physiological or pathological sense. Generally speaking, the physiological function of a zang-fu organ in the theory of viscera-state in traditional Chinese medicine may include the physiological functions of several organs in modern anatomical physiology; In modern anatomical physiology, the physiological function of an organ may also be dispersed in the physiological functions of several organs in the theory of Tibetan images. Zangxiang theory is based on viscera, which is the general name of viscera. According to the physiological function characteristics of viscera, it can be divided into three types: liver, heart, spleen, lung and kidney are called five zang-organs; The gallbladder, stomach, small intestine, large intestine, bladder and triple energizer are called six fu organs; Strange and unchanging six fu organs are brain, marrow, bone, pulse, gallbladder and daughter cells. The five internal organs have the same physiological characteristics, which are metaplasia and storing essence; The six fu organs have the same physiological characteristics, and they are developing vigorously and spreading to Shui Gu. Deficiency of visceral diseases and excess of visceral diseases; Excess of fu-organs can purge fu-organs, while deficiency of fu-organs can replenish fu-organs. The theory of Tibetan image has many characteristics, but its main feature is the systematic holistic view centered on the five internal organs, which is mainly reflected in the following aspects: 1. Zang-fu organs are divided into yin and yang, one yin and one yang is exterior and interior, and zang-fu organs are a whole. The examination website collects information about heart and small intestine, lung and large intestine, spleen and stomach, liver and gallbladder, kidney and bladder, pericardium and triple energizer, and forms an exterior-interior relationship. The main basis is that the yin and yang of meridians are opposite and connected; The close relationship between one of the zang-fu organs inside and outside and one of the zang-fu organs in physiological function. 2. The five internal organs are connected with the orifices of the body. According to the holistic view of Zangxiang theory, each of the five internal organs has its own external conditions, which have its specific connection with the body's orifices: for example, the heart, on the face, is filled with blood vessels and enlightened by the tongue; Lung, its flowers are in the hair, its filling in the skin, enlightenment in the nose; Spleen, white lips, tendon-filled opening; Liver, its flowers are in the claws, its stuffing is in the tendons, and it opens in the eyes; The kidney is abundant in the bone, and it is enlightened in the ear, and the second yin.