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在生理功能正常的情况下,经动脉流入组织和脏器的血液,流经毛细血管网后,可畅通无阻地经由静脉流出。静脉血中含的废物、废水及废气,则经肾脏、肺脏以及皮肤等脏器排出,若由于某种原因导致静脉扩张迂曲,血流不畅,瘀滞于局部,势必影响动脉血的流入,继之脏器、组织需要的营养物质和氧气不能及时得到补充,废物也不能经静脉按时运走,堆积成害。
In the case of normal physiological function, the blood flowing into the tissues and organs via the artery flows through the capillary network and flows out freely through the vein. Venous blood containing waste, waste water and waste gas, the kidneys, lungs and skin and other organs excreted, if for some reason leading to venous dilatation and tortuous, poor blood flow, stasis in the local, is bound to affect the inflow of arterial blood, Following the organs, nutrients and oxygen needed by the organization can not be replenished in time, and the waste can not be transported by the vein on time and accumulated as a hazard.