论文部分内容阅读
在我们的身体里,有一条奔腾的河流,它是鲜红的,这条河就是血液。血液是一种结缔组织,在封闭的管道——血管里流淌。血管遍布人体的第一个角落。在人身上
In our body, there is a flowing river, which is bright red, and the river is blood. Blood is a connective tissue that flows in a closed tube - the blood vessel. Blood vessels in the first corner of the human body. On the person