Tissue Drainage in Lymphatic System
Everyday around 21 liters of fluid from plasma, carrying dissolve substances and some plasma protein, escape from the arterial end of the capillaries and into the tissues.
Most of this fluid is returned directly to the bloodstream via the capillary at its venous end, but the excess, about ,3-4 litres of fluid, is drained away by the lymphatic vessels.
Without this, tissues would rapidly become waterlogged, and the cardiovascular system would begin to fall as the blood volume falls.
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