The seven orifices are the collective name of the seven orifices on the head and face, including eyes, ears, nose and mouth. That is, eyes 2, ears 2, nostrils 2 and mouth 1. The essence of the five zang-organs reaches seven orifices respectively, and the five zang-organs are sick, which is often reflected from the changes of the seven orifices. "Huangdi Neijing Lingshu Pulse Degree": "The five internal organs are often read from the upper seven orifices. Therefore, the lung qi leads to the nose, and the smell can be known from the lung and nose; Heart qi communicates with the tongue, and the tongue can know five flavors when the heart is harmonious; Liver qi can clear the eyes, and liver harmony can distinguish five colors; The spleen is in the mouth, and the spleen mouth can know the grains; Kidney-qi leads to the ear, while kidney-harmony leads to five tones. If the five internal organs are not harmonious, there will be no understanding. "
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