(1) heart: located in the chest and protected by pericardium. The main physiological functions of the heart are:

1 main blood vessel: refers to the function of heart qi to promote blood to run in miscellaneous veins and flow all over the body, giving play to nutrition and moistening.

2. Holding the spirit: The mind has the function of controlling the physiological activities of various organs of the human body and the mental consciousness and thinking activities of the human body.

3 main sweat: refers to the close relationship between heart and sweat.

Its beauty lies in the surface: whether the function of the heart is normal or not can often be reflected from the color of the surface.

5 Enlightening the tongue: refers to the tongue outside the heart, also known as "the tongue is the heart seedling".

(2) Lung: located in the chest, one on the left and one on the right, the highest position in the human viscera, so it is called Huagai. The main physiological functions of the lung are:

1 main qi, regulated breathing: refers to the place where the lungs are used for gas exchange inside and outside the body.

2. Main declaration: main declaration refers to the upward declaration of lung qi and its distribution to the periphery; Health refers to the downward movement of lung qi, which is the function of descending and keeping the respiratory tract clean.

3 main water channel: refers to the lung, which plays the role of dredging and coordinating the distribution and excretion of water and liquid in the body.

4. Its flower lies in fur: it refers to the physiological functions of the lungs, such as dispersing water and grains, promoting qi and protecting fur.

5 begin to understand the nose: because the nose is the channel for breathing.

(3) Spleen: located in the middle jiao and under the diaphragm. The main physiological functions of the spleen are:

1 is the main transport, that is, the spleen has the physiological function of transforming Shui Gu into subtle substances and absorbing and transporting them to the whole body.

2. Controlling blood: refers to the spleen controlling the blood to run in the pulse, so that it will not escape from the pulse.

3. Uprighting: refers to the rising of temper, which transforms the subtle Shui Gu of the heart, lungs, head and heart and lungs into qi and blood. Nourish the whole body.

Main muscles and limbs: The nutrients needed by human muscles and limbs are supplied by the subtle spleen Shui Gu.

5. Opening the mouth, its cleverness lies in the lips: it means that appetite and taste are related to the transport function of the spleen.

(4) Liver: located in the abdominal cavity, under the diaphragm and in the right rib. The main physiological functions of the liver are:

1 main qi-flowing: refers to the function of the liver to keep the whole body qi flowing smoothly, but not depressed.

Main storage of blood: refers to the function of the liver to store blood, regulate blood volume and prevent bleeding.

3 main reinforcement, its glory lies in claws: refers to the sufficiency of qi and blood, which is characterized by flexible hands and feet; Claw nails are tough, bright and ruddy.

4 begin to understand the ear

(5) Kidney: located at the waist, one on the left and one on the right. The main physiological functions of the kidney are:

1 "storing essence" refers to nourishing essence and tonifying kidney, promoting continuous filling, preventing the loss of essence for no reason, and giving full play to the physiological function of essence in the body.