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在我们赖以生存的地球上,遍布着纵横交错的河流。人体内的血管也象地球河流一样密布,把宝贵的“河水”——血液输向身体的四面八方,再送回中心泵站——心脏。 据科学家研究资料显示,人体各处纤细的微小血管有1000多亿条,全部连接起来几乎长达10万公里,可以绕地球两圈半;相当于我国长江、珠江、黑龙江和淮河等内河的通航里程,人的
There are criss - crossed rivers on the planet we live on. The blood vessels in the human body are as dense as the Earth’s rivers. They transport the precious “river water” -the blood to the body in all directions and then to the heart pumping station-the heart. According to the research data of scientists, there are more than 100 billion fine blood vessels in all parts of the human body, all of which are connected for almost 100,000 km and can circle two and a half round the earth. It is equivalent to the navigation of China’s Yangtze River, Pearl River, Heilongjiang River and Huai River Mileage, human