The kidney dominates bones, produces marrow and stores essence: The growth, development and repair of bone are all dependent upon the nourishment of the kidney essence. So, maldevelopment of bone in children is often caused by congenital deficiency of kidney essence. As a person is in his old age, his kidney essence is also declined and fails to nourish bone, then there may occur hyperosteogeny and osteoporosis. Development of bone tumor is closely related to the kidney.

The liver dominates tendons and stores blood: The liver has the function of storing blood and regulating blood volume. If the liver is short of blood and fails to nourish tendons, it will give rise to contracture of tendons, numbness and impaired movement of the limbs.

The spleen dominates muscles and four extremities: The spleen transforms the foodstuffs into essential substances and transports the nutritive essence to nourish the four extremities and bones. If the spleen fails in transformation and transportation, the essential substances will be short, then there may occur atrophy of muscle with no strength in movement. In addition, the diseases of tendon and bone are also difficult to be cured.