The pi-spleen dominates the muscles. This really means controlling the muscle bulk. Normally there is no muscle wasting, but when there is malnutrition of the muscles they are weak and wasted.

The pi-spleen takes the mouth as its orifice and opens through it. Normal people have a good appetite, a sense of smell and taste and red and moist lips. Abnormally there is anorexia, tastelessness or a sweetish, greasy taste, and pale sore lips. This is due to 'heat and damp in the pi-spleen'.

In addition the qi of pi-spleen lifts and fixes the internal organs in their normal position.

The fei-lung
The fei-lung takes charge of respiration. Normally respiration is even and the tissues are well oxygenated. When this function fails breathing is uneven, there is a cough, dyspnoea, shallow respiration and anoxia. This is due to 'a deficiency of qi of fei-lung which causes an impairment of dissipation and descent of clean qi (oxygen).

The fei-lung frees and regulates the water passage. This function covers the transportation and distribution of nutrients and water, the secretion of sweat and the excretion of urine. Abnormally there will be hyperhydrosis or hypohydrosis, oedema and difficulty in urination due to 'obstruction of the water passage'.

The fei-lung dominates the hair and skin. Normally the skin is lubricious, the hair lustrous, and sweating is normal. Abnormally the skin is rough, the hair dry and withered and the skin is 'loose'. This looseness opens the pores and increases the susceptibility to invasion by pathogenic factors.

The fei-lung takes the nose as its orifice and opens through it. Normally the nose is open and there is an acute sense of smell. Abnormally it may be obstructed, there may be anosmia, epistaxis and flaring of the alae nasi (usually accompanied by fever). This is due to 'invasion of the fei-lung by wind and cold or wind and heat'.

The shen-kidney
The shen-kidney is the main yin organ of the body. The shen-kidney dominates growth, reproduction and development. When this function fails there is a loss of reproductive function, retardation of growth, failure to thrive, and premature senility due to 'an insufficiency of the qi of shen-kidney'.

The shen-kidney produces marrow, filling the brain with marrow, dominating the bones and producing blood. Normally the spinal cord and the brain are fully developed, the bones are strong and the blood sufficient. Abnormally there will be dizziness, tinnitus, insomnia, poor memory and lassitude. The bones will be weak and brittle and the blood will be insufficient. This is due to 'an insufficiency of the essence of shen-kidney'.

The shen-kidney controls body water. This entails normal urine production and micturition. Abnormally there will be oliguria or anuria, oedema, difficult or dribbling micturition, polyuria, enuresis and incontinence. This is due to 'an insufficiency of yang of the shen-kidney failing to control body water'.

The shen-kidney controls the intake of clean qi (air). Abnormally there will be wheezing due to 'the failure of the shen-kidney to control the intake of clean air'.

The shen-kidney takes the ear as its orifice, opening through it. Normally there is sharp hearing, abnormally there is tinnitus, hearing loss, and even total deafness.

The pericardium
This may be called the organ of circulation in some texts. It is the least important of the zang organs.