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公元2世纪,罗马的一位内科医生认为,从心脏输出的血液是用来“灌溉”其他组织器官的,同时体内不断造出新的血液以供给心脏。显然,这种认识是很荒谬的——如果心脏每跳动一次就能输出50克血液,按心脏每分钟跳动72次计算,那么一个小时内心脏就能输出186千克血,这就相当于大部分成年人的体重的3倍。在这么短的时间内造出这么多血显然是不可能的,但是这一谬论居然被当作教学内容沿用了近1500年!
In the 2nd century AD, a Roman physician believed that the blood output from the heart was used to “irrigate” other tissues and organs, while new blood was constantly being made in the body to feed the heart. Obviously, this understanding is ridiculous - if the heart beats once to be able to output 50 grams of blood, beating the heart beating 72 beats per minute, then the heart can output 186 kilograms of blood an hour, which is equivalent to most 3 times the weight of adults. It is obviously impossible to make so much blood in such a short period of time, but this fallacy was actually used as a teaching content for nearly 1500 years!