有人体的呼吸道、消化道、泌尿道以及血管里有各种特殊的“阀门”,这些“阀门”可使空气、食物、尿液、血液按一定的方向运行。可见,它们对人体正常的生理功能起着重要的作用,如果它们发生故障。人体将会出现疾病。心脏阀门心脏在血液循环中好象是个动力泵,泵内有多个“阀门”——瓣膜,如二尖瓣、三尖瓣、肺动脉瓣、主动脉瓣。它们能顺血流而张开、逆血流而关闭,以保证心腔内血流的定向流动。由于风湿病、高血压病、先天性畸形等原因,可以引起瓣 There are a variety of special “valves” in the human respiratory tract, digestive tract, urinary tract and blood vessels. These “valves” allow air, food, urine and blood to run in a certain direction. As can be seen, they play an important role in the normal physiological functions of the human body if they fail. The human body will be sick. Heart Valve The heart appears to be a motive pump in the blood circulation. The pump has multiple “valves” - valves, such as the mitral, tricuspid, pulmonary and aortic valves. They can open along with blood flow, reverse blood flow and close, to ensure the directional flow of intracardiac blood flow. Due to rheumatism, hypertension, congenital malformations and other reasons, can cause the valve