Текст песни Александр Сокуров - Типы кровеносных сосудов
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Хартер Р.А. - Основы анатомии и прикладной кинезиологии There are two types of blood vessels: arteries carrying blood from the heart, and veins that transport blood to the heart. Arteries are thicker than veins, and their muscular walls help to move blood. Unlike arteries, the veins have valves that block the way of the blood in the opposite direction. The largest arteries are located close to the heart; As they move away from the heart, they branch out, forming much smaller arteries, the so-called arterioles, which deliver blood to even smaller units-the capillaries. These microscopic blood vessels form a dense network in the tissues of the body. The main exchange of nutrients and by-products of metabolism occurs here, in the capillary beds. Deprived of oxygen and nutrients along the way from the heart to the periphery, capillary blood reaches the end point and begins a long journey back to the heart through small vessels called venules. In a closed circulatory system, the venules are a continuation of the capillaries, these tiny structures eventually join together to form veins. As the blood gets closer and closer to the heart, the veins increase, moving an increasing volume of blood.
Harter RA - Fundamentals of anatomy and applied kinesiology
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