上周,我們介紹了著名心臟病醫(yī)生Michael DeBakey的生平。他于上個(gè)月逝世,享年99歲。今天,我們來(lái)談?wù)動(dòng)嘘P(guān)他工作的話(huà)題。心臟是個(gè)很復(fù)雜的器官。
We talked last week about the life of famed heart doctor Michael DeBakey. He died this month at age ninety-nine.Today, we talk about the object of his work. The heart is a complex organ that starts beating a few weeks after conception. At this point the heart is a tube. In the coming days, it grows …
上周,我們介紹了著名心臟病醫(yī)生Michael DeBakey的生平。他于上個(gè)月逝世,享年99歲。 今天,我們來(lái)談?wù)動(dòng)嘘P(guān)他工作的話(huà)題。心臟是個(gè)很復(fù)雜的器官,它在懷孕后幾周就開(kāi)始跳動(dòng)。這時(shí)心臟還只是一個(gè)管狀器官。在接下來(lái)的日子里,它慢慢發(fā)育,并彎曲成心臟的形狀。 隨后,它分成四部分。隨著心臟的跳動(dòng),它將血泵入這四個(gè)心…