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一个人一天中心脏压出的血液如果完全收集起来,可足足装满一个火车油罐。那么,心脏天天紧张工作为什么不感到疲劳呢?生理学告诉我们:心脏在它每次紧张收缩以后,总有一个心脏完全静止的时期。事实上,心脏在24小时之内,其实际工作时间只有9小时,另外的15小时在静止休息。根据这一原理,美国贝德汉
A person’s blood pressured out from the center of the heart can be fully loaded up with a train tank if it is completely collected. Well, the heart of the work every day, why do not you feel tired? Physiology tells us: the heart after every contraction in its nervous, there is always a period of complete rest of the heart. In fact, the heart within 24 hours, the actual working hours only 9 hours, the rest of the rest 15 hours rest. According to this principle, the United States Bedhan