Читать книгу Tai Chi: A practical approach to the ancient Chinese movement for health and well-being - Angus Clark - Страница 18
ОглавлениеTAI CHI PROVIDES the exercise the body needs to maintain its marvelous circulatory systems. First, it stimulates the pumping action of the heart. For many people, an over-sedentary lifestyle results in sluggish circulation of the blood and of the lymph fluid, which supplies the tissues with water and nutrients. Tai chi exercise combined with regular massage provide the necessary stimulants to both.
Muscular tension in well-exercised legs stimulates the return of circulating blood and lymph upward to the heart.
All the cells in the body are bathed in watery tissue fluid in which are dissolved the nutrients they need to live. Tissue fluid circulates in the bloodstream. The pumping action of the heart channels blood along arteries into a network of ever smaller blood vessels down to the capillaries, the smallest blood vessels that reach from the organs deep inside the body to the skin.
Molecules of tissue fluid containing water, oxygen, and essential nutrients can pass through the capillary walls into the minute spaces between the cells. From there they can be absorbed when needed by the surrounding cells.
Tissue fluid containing water, dissolved oxygen, and nutrients such as calcium and glucose passes through the capillary walls to bathe every cell in the body.
All the time, cells excrete excess water and unwanted chemicals such as carbon dioxide through their walls back into the tissue fluid, which drains into the bloodstream through tiny veins called venules. But a proportion of it, along with waste products such as dead cells and bacteria, becomes lymph, a milky fluid mixed with white blood cells, fats from ducts in the intestine, and proteins. Lymph is filtered through lymph nodes packed with disease-fighting lymphocytes or white blood cells.
