留美老师带你每日说英文 第456期:血液的作用

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台湾籍旅美老师今天交给我们的句子是：

Blood is the tissue that not only carries cells that transport oxygen, for example, the red blood cells, or fights infectious diseases, but it also carries messenger molecules, hormone-like factors that transport information from one cell to another, from one tissue to another, including the brain.
血液不只是夹带例如红血球这样的输氧细胞的组织，或是抵抗传染病，同时也夹带了像荷尔蒙这样的讯息因子，从一个细胞到另一个细胞，一个组织到另一个组织，在大脑里也一样。