Through observing nature, ancient Chinese realized that all things group together in pairs of opposites; heaven and earth, sun & moon, night and day, male and female, etc. The concepts of Yin & Yang were devised to define and explain the nature of all phenomena including the human body.
Yin & Yang are used to categorize both anatomic parts and physiological functions; examples are demonstrated by the following chart.
Yin –Yang Categories for Body Regions
Parts of the body
Interior, Abdomen, Lower body
Exterior, Back, Upper body
Tissues & Organs
Bones, Connective tissue, Liver, Heart, Spleen, Lung and Kidney
Skin, Body hair, Gall bladder, Stomach, Intestines, Bladder, Triple burner
In Chinese theories of medicine, harmony between Yin & Yang energy is health and imbalances lead to physical problems. Therefore, healing deals not just with symptoms but the underlying issues.