Qi or Chi
The character qi denotes a dynamic essence characterized by both substance and function. For example, clean qi, turbid qi, and the qi transformed from the essence of food are substantial qi, while the qi of the heart, liver, spleen, kidney, stomach, and the qi of the channels and collaterals are functional qi.
The classification of qi in the human body varies with its distribution, origin, and function.
The character qi denotes a dynamic essence characterized by both substance and function. For example, clean qi, turbid qi, and the qi transformed from the essence of food are substantial qi, while the qi of the heart, liver, spleen, kidney, stomach, and the qi of the channels and collaterals are functional qi.
The classification of qi in the human body varies with its distribution, origin, and function.
1. Primary Qi (yuan qi)
Primary qi is the most important and fundamental qi originating from the congenital essence. It is nourished and replenished by the fundamental substance of food after birth. Primary qi is also known as the qi of the kidney, and is distributed to the whole body via the sanjiao functions. It arouses and promotes the activities of the zang-fu organs and tissues. If primary qi is congenitally deficient or exhausted due to chronic disease, then various pathological changes will occur.
2. Aggregative Qi (zong qi)
This is the combination of inhaled clean qi through the lung with the fundamental substance qi of food digested and absorbed by the stomach and spleen. Aggregative qi is accumulated in the chest and has the function of nourishing the lung and the heart, thus promoting respiration and blood circulation.
This is the combination of inhaled clean qi through the lung with the fundamental substance qi of food digested and absorbed by the stomach and spleen. Aggregative qi is accumulated in the chest and has the function of nourishing the lung and the heart, thus promoting respiration and blood circulation.
3. Nutrient Qi (ying qi)
Nutrient qi originates from the essential substance of food transformed by the spleen and stomach. It is the component part of blood flowing throughout the body. Nutrient qi is actually the essential qi transformed from food and water. The nutrient qi is secreted by the body fluid, circulates in the blood vessels, and is transformed into blood to nourish the four extremities, the five zang and six fu organs.
Nutrient qi originates from the essential substance of food transformed by the spleen and stomach. It is the component part of blood flowing throughout the body. Nutrient qi is actually the essential qi transformed from food and water. The nutrient qi is secreted by the body fluid, circulates in the blood vessels, and is transformed into blood to nourish the four extremities, the five zang and six fu organs.
4. Defensive Qi (wei qi)
Defensive qi is mainly derived from the essential substances of food and water which form a part of the human body's yang qi. It circulates outside the vessels mainly spreading through the muscles and skin. Its physiological functions are
Defensive qi is mainly derived from the essential substances of food and water which form a part of the human body's yang qi. It circulates outside the vessels mainly spreading through the muscles and skin. Its physiological functions are
(1) defending the body surface against the invasion of exogenous pathogenic factors,
(2) warming and nourishing the tissues and organs, and
(3) adjusting the opening and closing of the pores.
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